Only a few years ago, buying an option that expires the same day was a niche curiosity. Today it is the core of the US index options market. According to Cboe, 0DTE options made up about 65% of SPX options volume in Q2 2026, and hit a record 66.2% in July 2026....
0DTE Options Explained: How They Work, Their Risks and Why Volume Exploded
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