SPX (SPX) Open Interest
$0.4789-1.49% (24h)
Total SPX futures open interest with a 30-day trend and per-exchange split.
$37.21M
Open Interest
USD notional, all venues
+86.79%
30-Day Change
vs $19.92M
15
Exchanges
with live SPX futures OI
Largest Venue
31.3% share
SPX Open Interest — Last 30 Days
Hourly total USD notional across all tracked exchanges
Rising open interest with rising price signals new money entering SPX longs; falling OI signals positions being closed.
SPX Open Interest by Exchange
Latest hourly snapshot · USD notional and market share