diff --git a/README.md b/README.md
index e3785720..86777491 100644
--- a/README.md
+++ b/README.md
@@ -69,6 +69,12 @@ We have deployed three major efficiency upgrades:
 2.  **Risk Star Topology**: Parallelized the Risk Debate (Risky/Safe/Neutral run at once) using a custom `merge_risk_states` reducer (-60% Risk Latency).
 3.  **Parallel I/O**: Implemented `ThreadPoolExecutor` for Reddit News fetching (5x-10x Speedup).
 
+**Logic Upgrade: The "Mental Model" Patch**
+Post-simulation audits revealed a "Value Trap" bias in Tech Platform analysis. We injected a new cognitive framework into the Trader Agent:
+*   **CapEx = Moat**: Strategic spending is now correctly interpreted as defense, not waste.
+*   **Regulatory Resilience**: Antitrust risk is treated as a sizing issue, not a thesis breaker.
+
+
 ### Analyst Team
 - Fundamentals Analyst: Evaluates company financials and performance metrics, identifying intrinsic values and potential red flags.
 - Sentiment Analyst: Analyzes social media and public sentiment using sentiment scoring algorithms to gauge short-term market mood.
diff --git a/SYSTEM_RULE_BOOK.md b/SYSTEM_RULE_BOOK.md
index df265444..b4697c19 100644
--- a/SYSTEM_RULE_BOOK.md
+++ b/SYSTEM_RULE_BOOK.md
@@ -100,6 +100,20 @@ We do not just execute; we adapt. The system includes a **Self-Reflection Mechan
 
 ---
 
+## VIII. MENTAL MODELS (The Cognitive Framework)
+To prevent "Value Trap" logic in Tech/Platform stocks, the Trader utilizes specific mental models distinct from traditional Value Investing.
+
+### 1. CapEx Distinction (The "Moat" Rule)
+*   **Maintenance CapEx:** Spending to keep the lights on (e.g., repairing a factory). This is a **COST**.
+*   **Strategic CapEx:** Spending to capture a new platform (e.g., Google building Data Centers for AI). This is **DEFENSE**.
+*   **The Rule:** For dominant platforms, massive CapEx during a platform shift is a **BULLISH** signal of durability, not a bearish signal of inefficiency.
+
+### 2. Regulatory Overhang (The "Size" Tax)
+*   **Concept:** Big Tech is always under investigation.
+*   **The Rule:** Treat Antitrust Risk as a **"Chronic Condition"** (like diabetes). You manage it by reducing position size (Risk Management). You do **NOT** treat it as a "Terminal Disease" (Panic Selling) unless a breakup order is signed and imminent.
+
+---
+
 ## V. EXECUTION DISCIPLINE
 
 1.  **Binary Thinking is the Enemy:** Rarely is the answer "Sell 100%" or "Buy 100%." We scale out of risks and scale into strength.