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Options Education

The Rise of 0DTE Options: What Every Trader Should Know

Skavinski Feb 18, 2026 2 min read 409 words

The 0DTE Revolution

Zero days to expiration (0DTE) options now account for over 40% of total SPX options volume. This is not a passing trend. It represents a fundamental shift in how market participants express directional views and hedge risk.

Why 0DTE Options Matter

For traders: 0DTE options offer leveraged directional exposure with defined risk and no overnight gap risk. A $5 wide SPX spread can cost $1-2, creating asymmetric payoffs within a single session.

For the market: The sheer volume of 0DTE activity means that the intraday gamma profile is constantly shifting. Dealer hedging flows from 0DTE positions can dominate price action, especially in the final two hours of trading.

The Gamma Amplifier

As options approach expiration, their gamma increases dramatically. An at-the-money SPX option with 0 days to expiry has gamma many times higher than the same strike one week out.

This means dealer hedging requirements change rapidly:

Gamma at 30 DTE:  ~0.02 per strike
Gamma at 7 DTE:   ~0.05 per strike
Gamma at 1 DTE:   ~0.12 per strike
Gamma at 0 DTE:   ~0.30+ per strike (ATM)

The practical effect: small moves in the underlying can force large hedging flows from dealers, which in turn moves the underlying further.

Key 0DTE Risk Factors

  1. Time decay is extreme: Theta accelerates exponentially. A morning position can lose 50%+ of its value by midday even if the underlying is flat.

  2. Bid-ask spreads widen: As expiration approaches, market makers widen spreads to account for increased gamma risk.

  3. Pin risk is real: Near expiration, options can flip between in-the-money and out-of-the-money rapidly, creating unpredictable assignment scenarios.

  4. Liquidity can evaporate: During volatile moves, 0DTE order books can thin out quickly.

The Structural Impact

The growth of 0DTE has changed market microstructure in measurable ways:

  • Intraday volatility patterns have shifted, with more activity concentrated in the open and close
  • The GEX profile now changes more dynamically throughout the day as 0DTE gamma rolls off
  • Dealer positioning resets daily rather than accumulating over weeks
  • Charm flows (delta decay) create predictable end-of-day movements as 0DTE positions expire

How to Incorporate 0DTE Data

Understanding the 0DTE gamma landscape gives you context for intraday price action. When combined with traditional multi-day GEX analysis, it provides a more complete picture of the mechanical flows driving the market.

Track real-time 0DTE gamma exposure on TeploMap. Filter by expiration to isolate same-day dealer positioning.