Holding a 0DTE option into the close means racing the most brutal part of time decay, dealing with widening spreads, and facing what happens at expiration. It's usually a bad idea, and here's what to expect.

Accelerating decay and widening spreads

0DTE theta decay accelerates into the final hours — an out-of-the-money option's remaining value evaporates quickly, so hesitation is expensive. At the same time, spreads widen as liquidity thins toward the bell, making it harder and costlier to exit at a fair price. The end of the day is when the option is least forgiving and hardest to trade out of.

What happens at expiration

If you hold to the bell, the outcome is binary: finish in-the-money and the option has value (and may be auto-exercised — SPY options are for shares, with real mechanics); finish out-of-the-money and it expires worthless. There's no middle ground at the end, and the last-minutes swing between the two can be violent. Most scalpers close well before this — see the last-15-minutes decision.

The final hour of a 0DTE is a knife fight: fastest decay, widest spreads, all-or-nothing at the bell. Most of the time, the smart move is to be out before it starts.

The quick takeaway

Holding 0DTE into the close means max decay, wide spreads, and binary expiration risk — usually not worth it for a scalp. Have an exit plan and generally close before the final stretch unless you have a specific reason. NoVo's exit ladder and stops are built to get you out on plan, not leave you white-knuckling the bell.