Expand model tag support: add GLM-5.1, simplify Anthropic IDs, scan tags anywhere in message

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gateway/knowledge/trading/strategies/options/strip.md

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+---
+description: "A bearish volatility strategy buying one ATM call and two ATM puts at strike K, profiting more from a downward move than an upward move of equal magnitude."
+tags: [options, volatility, bearish, strip]
+---
+
+# Strip
+
+**Section**: 2.35 | **Asset Class**: Options | **Type**: Volatility
+
+## Overview
+The strip is a volatility strategy consisting of a long position in one ATM call option and a long position in two ATM put options with strike K. This is a net debit trade. The trader's outlook is bearish (skewed toward downside). This is a capital gain strategy that profits from a large move in either direction but gains more from a downward move.
+
+## Construction
+- Buy 1 ATM call option at strike K
+- Buy 2 ATM put options at strike K, same expiry
+
+Net debit: D
+
+## Payoff Profile
+f_T = (S_T - K)+ + 2 × (K - S_T)+ - D
+
+- Upper breakeven: S*_up = K + D
+- Lower breakeven: S*_down = K - D/2
+- Max profit: P_max = unlimited  (especially strong on downside due to 2 puts)
+- Max loss: L_max = D  (if S_T = K at expiry)
+
+## Key Conditions / Signals
+- Bearish but uncertain of direction; expects a large move with downside bias
+- Low implied volatility environment is ideal (cheaper debit to enter)
+- The lower breakeven (D/2 below K) is closer to K than the upper breakeven (D above K)
+
+## Notes
+The strip is a modified straddle with bearish skew: two puts vs. one call. The downside potential is doubled relative to the upside (per unit of move). Maximum loss is capped at the net debit D.