diff --git a/cli/main.py b/cli/main.py
index 17a53c04..7e5ff3fb 100644
--- a/cli/main.py
+++ b/cli/main.py
@@ -1382,6 +1382,61 @@ def run_analysis():
         display_complete_report(final_state)
 
 
+def run_reflect(date: str | None = None, horizons_str: str = "30,90"):
+    """Core reflect logic. Callable from tests."""
+    from tradingagents.portfolio.lesson_store import LessonStore
+    from tradingagents.portfolio.selection_reflector import reflect_on_scan
+
+    reflect_date = date or datetime.datetime.now().strftime("%Y-%m-%d")
+    horizons = [int(h.strip()) for h in horizons_str.split(",")]
+
+    # Build quick_think LLM using DEFAULT_CONFIG
+    from tradingagents.graph.scanner_graph import ScannerGraph
+    scanner = ScannerGraph(config=DEFAULT_CONFIG.copy())
+    llm = scanner._create_llm("quick_think")
+
+    all_lessons = []
+    for horizon in horizons:
+        scan_date = (datetime.datetime.strptime(reflect_date, "%Y-%m-%d")
+                     - datetime.timedelta(days=horizon)).strftime("%Y-%m-%d")
+        console.print(f"[cyan]Reflecting on {scan_date} ({horizon}d ago)...[/cyan]")
+        lessons = reflect_on_scan(scan_date, reflect_date, llm, horizon)
+        all_lessons.extend(lessons)
+
+    store = LessonStore()
+    added = store.append(all_lessons)
+    console.print(f"[green]Added {added} new lessons. Total: {len(store.load_all())}[/green]")
+
+    # Print Rich table summary
+    if all_lessons:
+        table = Table(title="Reflected Lessons", box=box.ROUNDED)
+        table.add_column("Ticker", style="cyan bold")
+        table.add_column("Scan Date")
+        table.add_column("Horizon")
+        table.add_column("Alpha", style="magenta")
+        table.add_column("MFE / MAE")
+        table.add_column("Sentiment")
+        table.add_column("Screening Advice")
+        table.add_column("Exit Advice")
+        for l in all_lessons:
+            color = "green" if l.get("sentiment") == "positive" else ("red" if l.get("sentiment") == "negative" else "yellow")
+
+            alpha_str = f"{l.get('terminal_return_pct', 0.0) - l.get('spy_return_pct', 0.0):+.1f}%"
+            mfe_mae_str = f"+{l.get('mfe_pct', 0.0):.1f}% / {l.get('mae_pct', 0.0):.1f}%"
+
+            table.add_row(
+                l.get("ticker", ""),
+                l.get("scan_date", ""),
+                str(l.get("horizon_days", "")),
+                alpha_str,
+                mfe_mae_str,
+                f"[{color}]{l.get('sentiment', '')}[/{color}]",
+                l.get("screening_advice", ""),
+                l.get("exit_advice", "")
+            )
+        console.print(table)
+
+
 def run_scan(date: Optional[str] = None):
     """Run the 3-phase LLM scanner pipeline via ScannerGraph."""
     console.print(
@@ -1729,6 +1784,15 @@ def scan(
     run_scan(date=date)
 
 
+@app.command()
+def reflect(
+    date: Optional[str] = typer.Option(None, "--date", "-d", help="Reference date YYYY-MM-DD"),
+    horizons: str = typer.Option("30,90", "--horizons", help="Comma-separated lookback days"),
+):
+    """Reflect on past scan picks: compute returns, fetch news, generate screening lessons."""
+    run_reflect(date=date, horizons_str=horizons)
+
+
 @app.command()
 def pipeline():
     """Full pipeline: macro scan JSON → filter → per-ticker deep dive."""
diff --git a/tests/portfolio/test_candidate_prioritizer_memory.py b/tests/portfolio/test_candidate_prioritizer_memory.py
new file mode 100644
index 00000000..4b669d4f
--- /dev/null
+++ b/tests/portfolio/test_candidate_prioritizer_memory.py
@@ -0,0 +1,95 @@
+import pytest
+from tradingagents.portfolio.candidate_prioritizer import prioritize_candidates
+from tradingagents.agents.utils.memory import FinancialSituationMemory
+from tradingagents.portfolio.models import Portfolio, Holding
+
+@pytest.fixture
+def empty_portfolio():
+    return Portfolio(
+        portfolio_id="test_port",
+        name="test",
+        initial_cash=100000.0,
+        cash=100000.0,
+        total_value=100000.0,
+        created_at="2025-01-01"
+    )
+
+@pytest.fixture
+def test_candidate():
+    return {
+        "ticker": "AAPL",
+        "sector": "technology",
+        "thesis_angle": "growth",
+        "rationale": "High earnings potential",
+        "conviction": "high"
+    }
+
+def test_no_memory_backward_compat(empty_portfolio, test_candidate):
+    enriched = prioritize_candidates(
+        [test_candidate], empty_portfolio, [], {"max_sector_pct": 0.35}, selection_memory=None
+    )
+    assert len(enriched) == 1
+    assert enriched[0]["priority_score"] > 0
+    assert "skip_reason" not in enriched[0]
+
+def test_negative_match_zeroes_score(empty_portfolio, test_candidate):
+    memory = FinancialSituationMemory("test_mem")
+    # Matches the candidate description well
+    memory.add_situations([
+        ("AAPL technology growth High earnings potential high", "Avoid tech growth stocks in this macro"),
+        ("MSFT another", "Another lesson") # Add second situation to ensure BM25 idf is positive or normalized properly, or mock it
+    ])
+
+    # Mocking get_memories directly because BM25 scores can be tricky to predict with tiny corpora
+    original_get = memory.get_memories
+    memory.get_memories = lambda *args, **kwargs: [{"similarity_score": 0.9, "recommendation": "Avoid tech growth stocks in this macro"}]
+
+    enriched = prioritize_candidates(
+        [test_candidate], empty_portfolio, [], {"max_sector_pct": 0.35}, selection_memory=memory
+    )
+    assert len(enriched) == 1
+    assert enriched[0]["priority_score"] == 0.0
+    assert "Memory lesson" in enriched[0]["skip_reason"]
+    assert "Avoid tech growth stocks" in enriched[0]["skip_reason"]
+
+    memory.get_memories = original_get
+
+def test_positive_lessons_not_loaded(empty_portfolio, test_candidate):
+    memory = FinancialSituationMemory("test_mem")
+
+    enriched = prioritize_candidates(
+        [test_candidate], empty_portfolio, [], {"max_sector_pct": 0.35}, selection_memory=memory
+    )
+    assert enriched[0]["priority_score"] > 0
+
+def test_score_threshold_boundary(empty_portfolio, test_candidate):
+    # If the score is exactly 0.5 (or less), it should not trigger rejection
+    memory = FinancialSituationMemory("test_mem")
+    memory.add_situations([("completely unrelated stuff that barely matches maybe one token aapl", "lesson text")])
+
+    # Manually overwrite the get_memories to return a score exactly 0.5
+    original_get = memory.get_memories
+    memory.get_memories = lambda *args, **kwargs: [{"similarity_score": 0.5, "recommendation": "lesson text"}]
+
+    enriched = prioritize_candidates(
+        [test_candidate], empty_portfolio, [], {"max_sector_pct": 0.35}, selection_memory=memory
+    )
+    assert len(enriched) == 1
+    assert enriched[0]["priority_score"] > 0
+    assert "skip_reason" not in enriched[0]
+
+def test_skip_reason_contains_advice(empty_portfolio, test_candidate):
+    memory = FinancialSituationMemory("test_mem")
+    advice_text = "Specific unique advice string 12345"
+    memory.add_situations([("AAPL technology growth High earnings potential high", advice_text)])
+
+    original_get = memory.get_memories
+    memory.get_memories = lambda *args, **kwargs: [{"similarity_score": 0.9, "recommendation": advice_text}]
+
+    enriched = prioritize_candidates(
+        [test_candidate], empty_portfolio, [], {"max_sector_pct": 0.35}, selection_memory=memory
+    )
+    assert enriched[0]["priority_score"] == 0.0
+    assert advice_text in enriched[0]["skip_reason"]
+
+    memory.get_memories = original_get
diff --git a/tests/portfolio/test_lesson_store.py b/tests/portfolio/test_lesson_store.py
new file mode 100644
index 00000000..2dddac34
--- /dev/null
+++ b/tests/portfolio/test_lesson_store.py
@@ -0,0 +1,48 @@
+import json
+import pytest
+from pathlib import Path
+from tradingagents.portfolio.lesson_store import LessonStore
+
+@pytest.fixture
+def tmp_store(tmp_path):
+    store = LessonStore(tmp_path / "test_lessons.json")
+    yield store
+    store.clear()
+
+def test_append_to_empty(tmp_store):
+    lessons = [
+        {"ticker": "NVDA", "scan_date": "2025-12-27", "horizon_days": 30, "sentiment": "negative"},
+        {"ticker": "AAPL", "scan_date": "2025-12-27", "horizon_days": 30, "sentiment": "positive"},
+    ]
+    added = tmp_store.append(lessons)
+    assert added == 2
+    loaded = tmp_store.load_all()
+    assert len(loaded) == 2
+    assert loaded[0]["ticker"] == "NVDA"
+
+def test_deduplication(tmp_store):
+    lesson1 = {"ticker": "NVDA", "scan_date": "2025-12-27", "horizon_days": 30, "sentiment": "negative"}
+    lesson2 = {"ticker": "NVDA", "scan_date": "2025-12-27", "horizon_days": 30, "sentiment": "positive"}  # same dedup key
+
+    added1 = tmp_store.append([lesson1])
+    assert added1 == 1
+    added2 = tmp_store.append([lesson2])
+    assert added2 == 0
+
+    loaded = tmp_store.load_all()
+    assert len(loaded) == 1
+    assert loaded[0]["sentiment"] == "negative"
+
+def test_load_missing_file(tmp_store):
+    assert tmp_store.load_all() == []
+
+def test_atomic_write(tmp_store):
+    tmp_store.append([{"ticker": "NVDA", "scan_date": "2025-12-27", "horizon_days": 30}])
+    assert tmp_store.path.exists()
+    assert not tmp_store.path.with_suffix('.tmp').exists()
+
+def test_append_to_existing(tmp_store):
+    tmp_store.append([{"ticker": "NVDA", "scan_date": "2025-12-27", "horizon_days": 30}])
+    added = tmp_store.append([{"ticker": "AAPL", "scan_date": "2025-12-27", "horizon_days": 30}])
+    assert added == 1
+    assert len(tmp_store.load_all()) == 2
diff --git a/tests/portfolio/test_selection_reflector.py b/tests/portfolio/test_selection_reflector.py
new file mode 100644
index 00000000..eeb901a4
--- /dev/null
+++ b/tests/portfolio/test_selection_reflector.py
@@ -0,0 +1,106 @@
+import pytest
+import pandas as pd
+from unittest.mock import MagicMock
+from langchain_core.messages import AIMessage
+from tradingagents.portfolio.selection_reflector import (
+    fetch_price_trend, fetch_news_summary, generate_lesson, reflect_on_scan
+)
+
+@pytest.fixture
+def mock_yf_download(monkeypatch):
+    def _mock_download(tickers, start, end, **kwargs):
+        dates = pd.date_range(start, periods=5)
+        # Ticker goes up then down
+        ticker_closes = [100.0, 110.0, 105.0, 90.0, 85.0]
+        # SPY goes up steadily
+        spy_closes = [400.0, 402.0, 405.0, 407.0, 410.0]
+
+        df = pd.DataFrame({
+            "AAPL": ticker_closes,
+            "SPY": spy_closes
+        }, index=dates)
+
+        return df
+
+    monkeypatch.setattr("yfinance.download", _mock_download)
+    return _mock_download
+
+def test_fetch_price_data_normal(mock_yf_download):
+    terminal_return, spy_return, mfe_pct, mae_pct, days_to_peak, top_move_dates = fetch_price_trend("AAPL", "2025-01-01", "2025-01-05")
+
+    assert terminal_return == pytest.approx(-15.0)  # (85 - 100) / 100 * 100
+    assert spy_return == pytest.approx(2.5)      # (410 - 400) / 400 * 100
+    assert mfe_pct == pytest.approx(10.0)     # (110 - 100) / 100 * 100
+    assert mae_pct == pytest.approx(-15.0)    # (85 - 100) / 100 * 100
+    assert days_to_peak == 1                  # Peak is at index 1 (2025-01-02)
+    assert len(top_move_dates) == 3
+
+def test_fetch_price_data_single_day(monkeypatch):
+    monkeypatch.setattr("yfinance.download", lambda *args, **kwargs: pd.DataFrame({"AAPL": [100.0], "SPY": [400.0]}))
+    terminal_return, spy_return, mfe_pct, mae_pct, days_to_peak, top_move_dates = fetch_price_trend("AAPL", "2025-01-01", "2025-01-01")
+    assert terminal_return is None
+    assert spy_return is None
+    assert mfe_pct is None
+    assert mae_pct is None
+    assert days_to_peak is None
+    assert top_move_dates == []
+
+def test_fetch_news_summary_weighted(monkeypatch):
+    def mock_get_company_news(ticker, start, end):
+        if start == "2025-01-01":
+            return "- Start news 1\n- Start news 2\n- Start news 3"
+        elif start == "2025-01-02":
+            return "- Top move 1\n- Top move 1b"
+        elif start == "2025-01-04":
+            return "- Top move 2"
+        return ""
+    monkeypatch.setattr("tradingagents.portfolio.selection_reflector.get_company_news", mock_get_company_news)
+
+    summary = fetch_news_summary("AAPL", "2025-01-01", "2025-01-05", ["2025-01-02", "2025-01-04"])
+    assert "- Start news 1" in summary
+    assert "- Start news 2" in summary
+    assert "- Start news 3" not in summary  # Only taking 2 start news
+    assert "- Top move 1" in summary
+    assert "- Top move 1b" not in summary # Only taking 1 from each top move date
+    assert "- Top move 2" in summary
+
+def test_generate_lesson_valid():
+    llm = MagicMock()
+    llm.invoke.return_value = AIMessage(content='```json\n{"situation": "test sit", "screening_advice": "test screen", "exit_advice": "test exit", "sentiment": "negative"}\n```')
+
+    cand = {"ticker": "AAPL", "sector": "Tech", "thesis_angle": "growth", "rationale": "good", "conviction": "high"}
+
+    lesson = generate_lesson(llm, cand, -10.0, 2.0, 5.0, -12.0, 5, "news", 30)
+
+    assert lesson is not None
+    assert lesson["situation"] == "test sit"
+    assert lesson["screening_advice"] == "test screen"
+    assert lesson["exit_advice"] == "test exit"
+    assert lesson["sentiment"] == "negative"
+
+def test_generate_lesson_mfe_mae_in_prompt():
+    llm = MagicMock()
+    llm.invoke.return_value = AIMessage(content='{"situation": "a", "screening_advice": "b", "exit_advice": "c", "sentiment": "neutral"}')
+
+    cand = {"ticker": "AAPL"}
+    generate_lesson(llm, cand, -10.0, 2.0, 5.1, -12.2, 5, "news", 30)
+
+    call_args = llm.invoke.call_args[0][0]
+    prompt_text = call_args[0].content
+
+    assert "MFE): +5.1%" in prompt_text
+    assert "MAE): -12.2%" in prompt_text
+    assert "Day 5" in prompt_text
+
+def test_generate_lesson_bad_json():
+    llm = MagicMock()
+    llm.invoke.return_value = AIMessage(content='Not a JSON')
+
+    lesson = generate_lesson(llm, {}, -10.0, 2.0, 5.0, -12.0, 5, "news", 30)
+    assert lesson is None
+
+def test_reflect_on_scan_no_file(monkeypatch):
+    llm = MagicMock()
+    monkeypatch.setattr("tradingagents.portfolio.selection_reflector.load_scan_candidates", lambda date: [])
+    lessons = reflect_on_scan("2025-01-01", "2025-01-31", llm, 30)
+    assert lessons == []
diff --git a/tradingagents/graph/portfolio_setup.py b/tradingagents/graph/portfolio_setup.py
index 70003004..eac006af 100644
--- a/tradingagents/graph/portfolio_setup.py
+++ b/tradingagents/graph/portfolio_setup.py
@@ -169,7 +169,15 @@ class PortfolioGraphSetup:
                             h.enrich(prices[h.ticker], total_value)
                     portfolio.enrich(holdings)
 
-                ranked = prioritize_candidates(candidates, portfolio, holdings, config)
+                from tradingagents.portfolio.memory_loader import build_selection_memory
+
+                try:
+                    selection_memory = build_selection_memory()
+                except Exception as exc:
+                    logger.warning("prioritize_candidates_node: could not load selection_memory: %s", exc)
+                    selection_memory = None
+
+                ranked = prioritize_candidates(candidates, portfolio, holdings, config, selection_memory=selection_memory)
             except Exception as exc:
                 logger.error("prioritize_candidates_node: %s", exc)
                 ranked = []
diff --git a/tradingagents/portfolio/candidate_prioritizer.py b/tradingagents/portfolio/candidate_prioritizer.py
index ac9bd879..dec5bea5 100644
--- a/tradingagents/portfolio/candidate_prioritizer.py
+++ b/tradingagents/portfolio/candidate_prioritizer.py
@@ -14,6 +14,7 @@ from tradingagents.portfolio.risk_evaluator import sector_concentration
 
 if TYPE_CHECKING:
     from tradingagents.portfolio.models import Holding, Portfolio
+    from tradingagents.agents.utils.memory import FinancialSituationMemory
 
 
 # ---------------------------------------------------------------------------
@@ -94,12 +95,20 @@ def score_candidate(
     return conviction_weight * thesis_score * diversification_factor * held_penalty
 
 
+def _build_candidate_description(candidate: dict) -> str:
+    """Concatenate ticker, sector, thesis_angle, rationale, conviction for BM25 query."""
+    parts = [candidate.get(k, "") for k in
+             ("ticker", "sector", "thesis_angle", "rationale", "conviction")]
+    return " ".join(p for p in parts if p)
+
+
 def prioritize_candidates(
     candidates: list[dict[str, Any]],
     portfolio: "Portfolio",
     holdings: list["Holding"],
     config: dict[str, Any],
     top_n: int | None = None,
+    selection_memory: "FinancialSituationMemory | None" = None,
 ) -> list[dict[str, Any]]:
     """Score and rank candidates by priority_score descending.
 
@@ -137,6 +146,19 @@ def prioritize_candidates(
                 f"Sector '{sector}' is at or above max exposure limit "
                 f"({config.get('max_sector_pct', 0.35):.0%})"
             )
+
+        # Memory rejection gate
+        if selection_memory is not None and ps > 0.0:
+            desc = _build_candidate_description(candidate)
+            matches = selection_memory.get_memories(desc, n_matches=1)
+            if matches and matches[0]["similarity_score"] > 0.5:
+                ps = 0.0
+                item["priority_score"] = 0.0
+                item["skip_reason"] = (
+                    f"Memory lesson (score={matches[0]['similarity_score']:.2f}): "
+                    f"{matches[0]['recommendation'][:120]}"
+                )
+
         enriched.append(item)
 
     enriched.sort(key=lambda c: c["priority_score"], reverse=True)
diff --git a/tradingagents/portfolio/lesson_store.py b/tradingagents/portfolio/lesson_store.py
new file mode 100644
index 00000000..24b6d2f1
--- /dev/null
+++ b/tradingagents/portfolio/lesson_store.py
@@ -0,0 +1,66 @@
+import json
+import os
+from pathlib import Path
+from tradingagents.report_paths import REPORTS_ROOT
+
+class LessonStore:
+    """Append-only JSON store for screening lessons.
+
+    Deduplicates on (ticker, scan_date, horizon_days).
+    Atomic writes: write to .tmp, then os.replace().
+    """
+    DEFAULT_PATH = REPORTS_ROOT / "memory" / "selection_lessons.json"
+
+    def __init__(self, path: Path | str | None = None):
+        if path is None:
+            self.path = self.DEFAULT_PATH
+        else:
+            self.path = Path(path)
+
+        self.path.parent.mkdir(parents=True, exist_ok=True)
+
+    def load_all(self) -> list[dict]:
+        """Returns all lessons, or [] if file is missing."""
+        if not self.path.exists():
+            return []
+        try:
+            with open(self.path, "r", encoding="utf-8") as f:
+                return json.load(f)
+        except json.JSONDecodeError:
+            return []
+
+    def append(self, lessons: list[dict]) -> int:
+        """Appends lessons, skipping duplicates. Returns count added."""
+        if not lessons:
+            return 0
+
+        existing_lessons = self.load_all()
+        existing_keys = {
+            (l.get("ticker"), l.get("scan_date"), l.get("horizon_days"))
+            for l in existing_lessons
+        }
+
+        to_add = []
+        for l in lessons:
+            key = (l.get("ticker"), l.get("scan_date"), l.get("horizon_days"))
+            if key not in existing_keys:
+                to_add.append(l)
+                existing_keys.add(key)
+
+        if not to_add:
+            return 0
+
+        new_lessons = existing_lessons + to_add
+
+        tmp_path = self.path.with_suffix('.tmp')
+        with open(tmp_path, "w", encoding="utf-8") as f:
+            json.dump(new_lessons, f, indent=2)
+
+        os.replace(tmp_path, self.path)
+
+        return len(to_add)
+
+    def clear(self) -> None:
+        """Clears the store (for test isolation)."""
+        if self.path.exists():
+            self.path.unlink()
diff --git a/tradingagents/portfolio/memory_loader.py b/tradingagents/portfolio/memory_loader.py
new file mode 100644
index 00000000..0638018a
--- /dev/null
+++ b/tradingagents/portfolio/memory_loader.py
@@ -0,0 +1,23 @@
+from pathlib import Path
+from tradingagents.portfolio.lesson_store import LessonStore
+from tradingagents.agents.utils.memory import FinancialSituationMemory
+
+def load_into_memory(lesson_store: LessonStore,
+                     memory: FinancialSituationMemory) -> int:
+    """Populate memory with ONLY negative-sentiment lessons. Returns count loaded."""
+    lessons = lesson_store.load_all()
+    pairs = [
+        (l.get("situation", ""), l.get("screening_advice", l.get("advice", "")))
+        for l in lessons
+        if l.get("sentiment") == "negative"
+    ]
+    if pairs:
+        memory.add_situations(pairs)
+    return len(pairs)
+
+def build_selection_memory(path: Path | None = None) -> FinancialSituationMemory:
+    """Convenience: LessonStore + FinancialSituationMemory + load. Used by CLI."""
+    store = LessonStore(path)
+    memory = FinancialSituationMemory("selection_memory")
+    load_into_memory(store, memory)
+    return memory
diff --git a/tradingagents/portfolio/selection_reflector.py b/tradingagents/portfolio/selection_reflector.py
new file mode 100644
index 00000000..e7a43d66
--- /dev/null
+++ b/tradingagents/portfolio/selection_reflector.py
@@ -0,0 +1,250 @@
+import json
+import logging
+from datetime import datetime, timedelta
+import yfinance as yf
+import pandas as pd
+from langchain_core.messages import HumanMessage
+from tradingagents.agents.utils.json_utils import extract_json
+from tradingagents.report_paths import get_market_dir
+from tradingagents.portfolio.report_store import ReportStore
+from tradingagents.dataflows.finnhub import get_company_news
+
+logger = logging.getLogger(__name__)
+
+def load_scan_candidates(scan_date: str) -> list[dict]:
+    """Read macro_scan_summary.md for scan_date, extract stocks_to_investigate.
+    Falls back to report_store.load_scan() if .md absent."""
+    from tradingagents.portfolio.store_factory import create_report_store
+
+    try:
+        scan_dir = get_market_dir(scan_date)
+        summary_path = scan_dir / "macro_scan_summary.md"
+        if summary_path.exists():
+            content = summary_path.read_text(encoding="utf-8")
+            data = extract_json(content)
+            if isinstance(data, dict) and "stocks_to_investigate" in data:
+                return data["stocks_to_investigate"]
+    except Exception as e:
+        logger.warning(f"Error reading macro_scan_summary.md for {scan_date}: {e}")
+
+    try:
+        store = create_report_store()
+        scan_data = store.load_scan(scan_date)
+        if scan_data and isinstance(scan_data, dict) and "stocks_to_investigate" in scan_data:
+            return scan_data["stocks_to_investigate"]
+    except Exception as e:
+        logger.warning(f"Error loading scan from ReportStore for {scan_date}: {e}")
+
+    return []
+
+def fetch_price_trend(ticker: str, start_date: str, end_date: str) -> tuple[float | None, float | None, float | None, float | None, int | None, list[str]]:
+    """Download [ticker, SPY] via yf.download().
+    Returns (terminal_return, spy_return, mfe_pct, mae_pct, days_to_peak, top_move_dates).
+    - mfe_pct: Maximum Favorable Excursion (peak return vs entry)
+    - mae_pct: Maximum Adverse Excursion (worst drawdown from entry)
+    - days_to_peak: Integer number of days from start_date to Highest_High
+    - top_move_dates: up to 3 dates with largest single-day absolute price moves
+    Returns (None, None, None, None, None, []) if < 2 trading days or download fails.
+    """
+    def _local_safe_pct(closes: pd.Series, days_back: int) -> float | None:
+        if len(closes) < days_back + 1:
+            return None
+        base = closes.iloc[-(days_back + 1)]
+        current = closes.iloc[-1]
+        if base == 0:
+            return None
+        return (current - base) / base * 100
+
+    try:
+        hist = yf.download(
+            [ticker, "SPY"],
+            start=start_date,
+            end=end_date,
+            auto_adjust=True,
+            progress=False
+        )
+        if hist.empty or len(hist) < 2:
+            return None, None, None, None, None, []
+
+        if isinstance(hist.columns, pd.MultiIndex):
+            closes = hist["Close"]
+        else:
+            closes = hist
+
+        if ticker not in closes.columns or "SPY" not in closes.columns:
+             return None, None, None, None, None, []
+
+        stock_closes = closes[ticker].dropna()
+        spy_closes = closes["SPY"].dropna()
+
+        if len(stock_closes) < 2 or len(spy_closes) < 2:
+            return None, None, None, None, None, []
+
+        # Terminal returns
+        terminal_return = _local_safe_pct(stock_closes, len(stock_closes) - 1)
+        spy_return = _local_safe_pct(spy_closes, len(spy_closes) - 1)
+
+        # MFE / MAE
+        entry_price = stock_closes.iloc[0]
+        if entry_price == 0:
+            return None, None, None, None, None, []
+
+        peak_price = stock_closes.max()
+        worst_price = stock_closes.min()
+
+        mfe_pct = (peak_price - entry_price) / entry_price * 100
+        mae_pct = (worst_price - entry_price) / entry_price * 100
+
+        # Days to peak
+        start_datetime = stock_closes.index[0]
+        peak_datetime = stock_closes.idxmax()
+        days_to_peak = (peak_datetime - start_datetime).days
+
+        # Top move dates
+        stock_returns = stock_closes.pct_change().dropna()
+        abs_returns = stock_returns.abs()
+        top_moves = abs_returns.nlargest(3)
+        top_move_dates = [d.strftime("%Y-%m-%d") for d in top_moves.index]
+
+        return terminal_return, spy_return, mfe_pct, mae_pct, days_to_peak, top_move_dates
+
+    except Exception as e:
+        logger.warning(f"Error fetching price data for {ticker}: {e}")
+        return None, None, None, None, None, []
+
+def fetch_news_summary(ticker: str, start_date: str, end_date: str, top_move_dates: list[str], n: int = 5) -> str:
+    """Fetch n headlines, weighted toward largest-move dates.
+    Strategy: 2 headlines from window start (initial catalyst context),
+    3 headlines from dates nearest top_move_dates (outcome context).
+    Returns bullet-list string."""
+
+    headlines = []
+
+    # 1. Fetch 2 headlines from the start of the window
+    try:
+        start_news_md = get_company_news(ticker, start_date, start_date)
+        # Assuming get_company_news returns markdown list, extract lines starting with -
+        if start_news_md:
+            start_lines = [line for line in start_news_md.split('\n') if line.strip().startswith('-')]
+            headlines.extend(start_lines[:2])
+    except Exception as e:
+        logger.warning(f"Failed to fetch start news for {ticker}: {e}")
+
+    # 2. Fetch 3 headlines from top move dates
+    try:
+        top_news_lines = []
+        for date_str in top_move_dates:
+            news_md = get_company_news(ticker, date_str, date_str)
+            if news_md:
+                lines = [line for line in news_md.split('\n') if line.strip().startswith('-')]
+                if lines:
+                    top_news_lines.append(lines[0]) # Get best headline for each top move date
+
+        headlines.extend(top_news_lines[:3])
+    except Exception as e:
+        logger.warning(f"Failed to fetch top move news for {ticker}: {e}")
+
+    if not headlines:
+        return "No specific headlines found."
+
+    return "\n".join(headlines)
+
+def generate_lesson(llm, candidate: dict, terminal_return: float | None,
+                    spy_return: float | None, mfe_pct: float | None,
+                    mae_pct: float | None, days_to_peak: int | None,
+                    news_summary: str, horizon_days: int) -> dict | None:
+    """Invoke quick_think LLM, parse JSON via extract_json(), return lesson dict.
+    Returns None on parse failure (logs warning)."""
+    if terminal_return is None or spy_return is None:
+        return None
+
+    prompt = f"""STOCK SELECTION REVIEW (0 TO {horizon_days} DAYS)
+======================
+Ticker:       {candidate.get('ticker')} | Sector: {candidate.get('sector')}
+Original thesis: {candidate.get('thesis_angle')} — {candidate.get('rationale')}
+
+THE TREND STORY
+------------------
+Terminal Return: {terminal_return:+.1f}% (SPY Benchmark: {spy_return:+.1f}%)
+Optimal Sell Moment (MFE): {mfe_pct:+.1f}% (Reached on Day {days_to_peak})
+Deepest Drawdown (MAE): {mae_pct:+.1f}%
+
+TOP HEADLINES
+-------------
+{news_summary}
+
+Return ONLY a JSON object with the following keys:
+- "situation": 1-2 sentences describing the stock pattern/thesis type.
+- "screening_advice": 1 sentence on whether the scanner should buy this setup again.
+- "exit_advice": 1 sentence defining the optimal exit strategy based on the MFE/MAE (e.g., "Take profits at +20% or tighten trailing stops after 20 days").
+- "sentiment": "positive" | "negative" | "neutral"
+"""
+    try:
+        response = llm.invoke([HumanMessage(content=prompt)])
+        data = extract_json(response.content if hasattr(response, 'content') else response)
+
+        if not data or not isinstance(data, dict):
+            logger.warning(f"LLM response parse failure: {response}")
+            return None
+
+        # Verify required keys
+        if not all(k in data for k in ["situation", "screening_advice", "exit_advice", "sentiment"]):
+            logger.warning(f"LLM response missing required keys: {data}")
+            return None
+
+        return data
+    except Exception as e:
+        logger.warning(f"Error generating lesson: {e}")
+        return None
+
+def reflect_on_scan(scan_date: str, reflect_date: str, llm, horizon_days: int) -> list[dict]:
+    """Top-level: load candidates, fetch data, generate lessons, return list."""
+    candidates = load_scan_candidates(scan_date)
+    lessons = []
+
+    for cand in candidates:
+        ticker = cand.get("ticker")
+        if not ticker:
+            continue
+
+        terminal_return, spy_return, mfe_pct, mae_pct, days_to_peak, top_move_dates = fetch_price_trend(ticker, scan_date, reflect_date)
+        if terminal_return is None:
+            continue
+
+        news_summary = fetch_news_summary(ticker, scan_date, reflect_date, top_move_dates)
+
+        lesson_data = generate_lesson(
+            llm=llm,
+            candidate=cand,
+            terminal_return=terminal_return,
+            spy_return=spy_return,
+            mfe_pct=mfe_pct,
+            mae_pct=mae_pct,
+            days_to_peak=days_to_peak,
+            news_summary=news_summary,
+            horizon_days=horizon_days
+        )
+
+        if lesson_data:
+            alpha = terminal_return - spy_return
+            lesson = {
+                "ticker": ticker,
+                "scan_date": scan_date,
+                "reflect_date": reflect_date,
+                "horizon_days": horizon_days,
+                "terminal_return_pct": round(terminal_return, 2),
+                "spy_return_pct": round(spy_return, 2),
+                "alpha_pct": round(alpha, 2),
+                "mfe_pct": round(mfe_pct, 2) if mfe_pct is not None else None,
+                "mae_pct": round(mae_pct, 2) if mae_pct is not None else None,
+                "days_to_peak": days_to_peak,
+                "news_summary": news_summary,
+                "situation": lesson_data["situation"],
+                "screening_advice": lesson_data.get("screening_advice", lesson_data.get("advice", "")),
+                "exit_advice": lesson_data.get("exit_advice", ""),
+                "sentiment": lesson_data["sentiment"],
+                "created_at": datetime.now().isoformat()
+            }
+            lessons.append(lesson)
+
+    return lessons