According to The Kobeissi Letter, 0DTE options now account for a record 75% of the Nasdaq’s total options volume, a share that has tripled over the last three years, source: The Kobeissi Letter on X, Aug 31, 2025. According to The Kobeissi Letter, 0DTE activity in the S&P 500 has reached an all-time high of 65%, signaling unprecedented same-day options participation across major US indices, source: The Kobeissi Letter on X, Aug 31, 2025.