QuantInsti

The 0-DTE Options Trap: Gamma Risk, Gap Risk & Black Swan Survival

The video examines the growing popularity of zero‑day‑to‑expiration (0‑DTE) options and highlights the unique risks they pose, especially gamma risk, theta decay, and the potential for rapid, large‑scale losses. Because 0‑DTE contracts expire at market close, traders avoid overnight gap risk, but they inherit extreme gamma exposure that can move a position against them in seconds. Theta decay benefits out‑of‑the‑money legs, yet the rapid time decay forces traders to be constantly reactive. The speaker stresses using spreads instead of naked shorts to cap unlimited loss and setting predefined exit points. Illustrative anecdotes include a trader who took only ten trades in a 90‑day competition, betting his entire capital without stop‑losses and getting lucky, and another who was caught in a 20% market gap after the 2009 election, suffering a sizable loss because the position was held overnight. The takeaway for market participants is clear: 0‑DTE strategies demand disciplined risk controls, spread structures, and strict exit rules. Without them, the allure of quick theta decay can quickly turn into catastrophic loss, threatening both individual portfolios and broader market stability.