Expand model tag support: add GLM-5.1, simplify Anthropic IDs, scan tags anywhere in message
- 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
This commit is contained in:
@@ -0,0 +1,33 @@
|
||||
---
|
||||
description: "A sideways strategy buying stock and selling two ATM calls at strike K, replicating a short straddle by replacing the short put with a synthetic short put."
|
||||
tags: [options, income, neutral, synthetic, straddle]
|
||||
---
|
||||
|
||||
# Short Call Synthetic Straddle
|
||||
|
||||
**Section**: 2.30 | **Asset Class**: Options | **Type**: Income
|
||||
|
||||
## Overview
|
||||
The short call synthetic straddle (the same as a short straddle with the put replaced by a synthetic put) amounts to buying stock and selling two ATM (or nearest OTM) call options with strike K. The trader's outlook is neutral. This is a capital gain strategy. We assume S0 <= K.
|
||||
|
||||
## Construction
|
||||
- Buy 1 share of stock at S0
|
||||
- Sell 2 ATM call options at strike K, same expiry
|
||||
|
||||
Net credit: C
|
||||
|
||||
## Payoff Profile
|
||||
f_T = S_T - S0 - 2 × (S_T - K)+ + C
|
||||
|
||||
- Upper breakeven: S*_up = 2K - S0 + C
|
||||
- Lower breakeven: S*_down = S0 - C
|
||||
- Max profit: P_max = K - S0 + C (at S_T = K)
|
||||
- Max loss: L_max = unlimited (stock can rise without bound; short 2 calls)
|
||||
|
||||
## Key Conditions / Signals
|
||||
- Neutral view; expects stock to stay near K through expiry
|
||||
- S0 <= K (stock at or below the call strike)
|
||||
- High implied volatility makes the collected credit from the two short calls larger
|
||||
|
||||
## Notes
|
||||
Unlimited loss on the upside due to the two short calls. The long stock provides partial offset against rising prices but is insufficient beyond the breakeven. Active management or stop-losses are essential.
|
||||
Reference in New Issue
Block a user