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kalshi-crypto-index-markets

Kalshi daily and hourly range markets on crypto prices (BTC, ETH) and equity indices (S&P 500, Nasdaq-100) — bracket structure, Gaussian P(YES) modeling on price/vol, close-offset decision timing, longshot-sell edge with honest evidence bounds

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# Kalshi Crypto & Index Range Markets

Kalshi lists daily (and for crypto, hourly) **range bracket markets** on the level of four liquid underlyings: S&P 500, Nasdaq-100, Bitcoin, and Ethereum. The math is the same partition-and-Gaussian framework as weather brackets — the variable is just price/return and σ comes from the underlying's realized or implied volatility, not a temperature model.

> Cross-references: for Kalshi API mechanics see `kalshi-api`; for the strategy, sizing, and backtesting framework see `prediction-market-strategy`; for the temperature counterpart see `kalshi-weather-markets`; for the shared bracket/overround formulas see `prediction-markets/references/brackets-and-settlement.md`.

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## Series & Market-Type Mapping

```python
SERIES_MARKET = {
    "KXINX":       "index",   # S&P 500 index level
    "KXNASDAQ100": "index",   # Nasdaq-100 index level
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