Event study (survivorship‑free). Dividend‑adjusted daily closes for SPY (from Jan 29, 1993), QQQ, IWM, DIA and the 11 Select Sector SPDR ETFs, to Oct 29, 2026. A 52‑week high close is a close at or above every close of the prior 252 trading days. An event is the first such close after at least 63 trading days (about three months) without one. Forward returns are measured 21, 63, 126 and 252 trading days later (about 1, 3, 6 and 12 months), on each fund’s own closes. The comparison is every trading day of the same fund over the same period. “Fell 10%+” means the lowest close in the next 252 trading days was at least 10% below the event close. Events too recent for a horizon are left out of that horizon.
Breadth (today’s members). The current S&P 500 list as of Oct 20, 2026; 500 of the 503 members had a full year of history on Oct 29, 2026. “Within 2%” means a close no more than 2% below the highest close of the past 252 trading days. The share history uses the same list on each trading day and month‑end since January 2001, counting days with at least 300 members with history. Sectors are Exent’s sector labels. No forward returns are calculated for individual members, because a list of today’s survivors would overstate them.
Closing highs differ slightly from the intraday highs on most quote pages. All figures describe the past and are not a forecast.