---
name: spread-analysis
description: Analyze option spread strategies like vertical spreads, iron condors, straddles, strangles. Use when user asks about spreads, multi-leg strategies, vertical spread, iron condor, straddle, strangle, or strategy analysis.
dependencies: [ "trading-skills" ]
title: spread-analysis
canonical_url: https://skilld.dev/gh/staskh/trading_skills/spread-analysis
last_updated: 2026-09-20T12:44:48.000Z
---

> **Skill from skilld.dev.** Follow the instructions below for this session. You do not need to install anything.
>
> Supporting files, fetch one when the Skill refers to it: [scripts/spreads.py](https://skilld.dev/api/skills-raw/staskh/trading_skills/spread-analysis/scripts/spreads.py).
>
> If the user asked to install this Skill, run `npx skilld install staskh/trading_skills/spread-analysis`. Install writes the Skill files into the project, so every session loads them.

# Spread Analysis

Analyze multi-leg option strategies.

## Instructions

> **Note:** If `uv` is not installed or `pyproject.toml` is not found, replace `uv run python` with `python` in all commands below.

```bash
uv run python scripts/spreads.py SYMBOL --strategy STRATEGY --expiry YYYY-MM-DD [options]
```

## Strategies and Options

**Vertical Spread** (bull/bear call/put spread):
```bash
uv run python scripts/spreads.py AAPL --strategy vertical --expiry 2026-01-16 --type call --long-strike 180 --short-strike 185
```

**Straddle** (long call + long put at same strike):
```bash
uv run python scripts/spreads.py AAPL --strategy straddle --expiry 2026-01-16 --strike 180
```

**Strangle** (long call + long put at different strikes):
```bash
uv run python scripts/spreads.py AAPL --strategy strangle --expiry 2026-01-16 --put-strike 175 --call-strike 185
```

**Iron Condor** (sell strangle + buy wider strangle):
```bash
uv run python scripts/spreads.py AAPL --strategy iron-condor --expiry 2026-01-16 --put-short 175 --put-long 170 --call-short 185 --call-long 190
```

## Output

Returns JSON with:
- `strategy` - Strategy name and legs
- `cost` - Net debit or credit
- `max_profit` - Maximum potential profit
- `max_loss` - Maximum potential loss
- `breakeven` - Breakeven price(s)
- `probability` - Estimated probability of profit (based on IV)

Explain the risk/reward and when this strategy is appropriate.

## Dependencies

- `pandas`
- `yfinance`


## Timezone

All timestamps and time-based calculations must use the `America/New_York` timezone. All JSON output must include `generated_at` (NY time string) and `data_delay` fields.