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- Flink update_bars debouncing - update_bars subscription idempotency bugfix - Price decimal correction bugfix of previous commit - Add GLM-5.1 model tag alongside renamed GLM-5 - Use short Anthropic model IDs (sonnet/haiku/opus) instead of full version strings - Allow @tags anywhere in message content, not just at start - Return hasOtherContent flag instead of trimmed rest string - Only trigger greeting stream when tag has no other content - Update workspace knowledge base references to platform/workspace and platform/shapes - Hierarchical knowledge base catalog - 151 Trading Strategies knowledge base articles - Shapes knowledge base article - MutateShapes tool instead of workspace patch
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gateway/knowledge/trading/strategies/options/short-guts.md
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gateway/knowledge/trading/strategies/options/short-guts.md
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description: "A sideways income strategy selling an ITM call at K1 and an ITM put at K2 > K1, collecting a higher premium than a short straddle but with higher risk and a narrower profit zone."
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tags: [options, income, neutral, guts]
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---
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# Short Guts
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**Section**: 2.27 | **Asset Class**: Options | **Type**: Income
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## Overview
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The short guts is a sideways strategy consisting of a short position in an ITM call option with strike K1 and a short position in an ITM put option with strike K2 (K2 > K1). This is a net credit trade. Since both options are ITM, the initial credit is higher than in a short straddle position; the flipside is that the risk is also higher. The trader's outlook is neutral. This is an income strategy. We assume C > K2 - K1.
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## Construction
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- Sell 1 ITM call option at strike K1
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- Sell 1 ITM put option at strike K2 (K2 > K1), same expiry
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Net credit: C (assumed C > K2 - K1)
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## Payoff Profile
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f_T = -(S_T - K1)+ - (K2 - S_T)+ + C
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- Upper breakeven: S*_up = K1 + C
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- Lower breakeven: S*_down = K2 - C
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- Max profit: P_max = C - (K2 - K1) (if K1 <= S_T <= K2; intrinsic value reduces profit)
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- Max loss: L_max = unlimited (stock can move far in either direction)
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## Key Conditions / Signals
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- Neutral view; expects stock to stay in the range [K1, K2] through expiry
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- The higher credit offsets the reduced maximum profit zone relative to a short straddle
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- High implied volatility environment is ideal for collecting large premium
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## Notes
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The assumption C > K2 - K1 prevents risk-free arbitrage. Maximum profit is reduced by the intrinsic spread K2 - K1. The position is short vega and long theta with unlimited directional risk.
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