On Market Measure, Nick and Kai break down February — officially the toughest month for 0DTE strategies in their three-year dataset. Despite SPX finishing down less than 1% on the month, intraday volatility told a very different story. Five losing days — the most ever recorded in a 30-day stretch — drove negative performance across all core strategies, from 20-delta iron condors to put spreads, even with 25% profit targets and no stop losses.

The key driver was early, one-direction intraday moves that offered little chance to manage winners. Kai also revisits the 8:30 vs 9:00 entry debate, showing that while February favored waiting 30 minutes, long-term results between the two approaches remain nearly identical. The takeaway: February was a stress test, not a broken system — and understanding intraday range matters more than headline monthly returns.

On Market Measure, Nick and Kai break down February — officially the toughest month for 0DTE strategies in their three-year dataset. Despite SPX finishing down less than 1% on the month, intraday volatility told a very different story. Five losing days — the most ever recorded in a 30-day stretch — drove negative performance across all core strategies, from 20-delta iron condors to put spreads, even with 25% profit targets and no stop losses.

The key driver was early, one-direction intraday moves that offered little chance to manage winners. Kai also revisits the 8:30 vs 9:00 entry debate, showing that while February favored waiting 30 minutes, long-term results between the two approaches remain nearly identical. The takeaway: February was a stress test, not a broken system — and understanding intraday range matters more than headline monthly returns.

Much like theta decay drives premium sellers to manage trades early, Vega decay offers a parallel rationale: entering near 45 DTE captures maximum volatility sensitivity, while holding into single-digit DTE leaves traders exposed to gamma risk with little Vega benefit remaining. Calendar spreads were used to illustrate the dynamic before applying it to single-cycle short premium trades.

The takeaway: managing positions early isn't just about locking in theta gains — it's also about exiting before Vega erodes the trade's edge entirely.

Much like theta decay drives premium sellers to manage trades early, Vega decay offers a parallel rationale: entering near 45 DTE captures maximum volatility sensitivity, while holding into single-digit DTE leaves traders exposed to gamma risk with little Vega benefit remaining. Calendar spreads were used to illustrate the dynamic before applying it to single-cycle short premium trades.

The takeaway: managing positions early isn't just about locking in theta gains — it's also about exiting before Vega erodes the trade's edge entirely.