Methodology. IBIT is the iShares Bitcoin Trust ETF (BlackRock), and this chart tracks the outstanding open interest on options written on the ETF — the total number of option contracts still open at the daily snapshot, plus the split into calls and puts (blue area = total, green = calls, red = puts) and the put/call ratio (white line). The bar chart below breaks the latest snapshot down by time to expiry (0DTE through 180D+). One contract = 100 shares of IBIT. Data: one snapshot per trading day, taken after the US close from Cboe delayed options data (~15-minute delayed). History begins 2026-08-11 — IBIT options launched Nov 2024 but no free historical OI archive exists, so the series accumulates forward from the first snapshot. Updated 2026-08-11.