NIFTY, BANKNIFTY, SENSEX Straddle Price
Live {Sym} ATM straddle price with intraday decay tracking. Free realtime — no login.
What is a straddle?
A straddle is buying (or selling) one ATM Call and one ATM Put with the same strike and expiry. The straddle price = ATM CE premium + ATM PE premium — and it's the market's ATM implied 1-day move (approximately). Live straddle tracking is popular with intraday traders because it's a clean single-number gauge of implied volatility for the current session. The hero card shows current straddle, opening straddle, and decay so far today.
Straddle decay = pure theta on the ATM
The decay number is (opening straddle − current straddle). A positive decay means the straddle is CHEAPER now than at 9:15 — theta is winning, and short-straddle sellers are profitable so far. Decay of 30%+ by lunch usually means a pin-day (low realised vol). Decay of 0% or NEGATIVE by lunch means realised vol > implied — long-straddle buyers are profitable. Session close decay predictably follows the DTE: on expiry-day it decays 100%; on 5-DTE it decays ~15% per full session (all else equal).
Selling vs buying the straddle
Short straddle (sell ATM CE + sell ATM PE) collects the full premium up-front, profits from theta and IV crush, has UNLIMITED loss if spot breaks either way. Best on high-IV days with pin expected. Long straddle pays the premium, profits from volatile moves, capped loss = premium paid. Best on low-IV days with a catalyst expected. Our [Strategy Lab](/strategy-lab) has 5+ pre-built straddle variants (pinned short, calendar, ATM-strangle, ratio) with live payoff and margin.
Straddle spread + gamma regime
Short-gamma regime (spot below γ-flip on the [ GEX page](/gamma-exposure/)) is HOSTILE to short straddles — dealer hedging amplifies moves and the sellers get run over. Long-gamma regime is friendly — moves get dampened and sellers collect. This is why straddle traders MUST cross-reference GEX before entering. The Straddle Intelligence panel in /dashboard combines both live.
Historical straddle P&L context
Over 3 years of weekly expiry, short-straddle-at-open closed profitable ~54% of sessions but had 12% drawdowns on the losing 46%. Long straddles had opposite: profitable ~35% but with occasional 200%+ wins. Position sizing is the ONLY thing that makes either strategy survivable long-term. The Backtest Lab has both variants with full IS/OOS gates.
Frequently Asked Questions
Is straddle price the same as implied volatility?
Related but not identical. Straddle price ÷ spot ÷ √(DTE/365) gives implied vol (approximately).
Why does the ATM strike change during the session?
ATM shifts as spot moves. When spot rises past a strike, the new ATM becomes the one above.
What's a normal straddle decay curve?
Front-loaded on expiry-day (60% by lunch, 100% by close). Even on 5-DTE, 30% decay by 14:00 is common on pin sessions.
Can I get straddle alerts?
Yes — inside /dashboard set a straddle-price threshold; Telegram alert fires.
How fresh is this data?
60-second cache on this page. Live 5-15 sec on /dashboard.
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