Woofun AI data shows that global SPY futures open interest totals approximately 75,900 contracts, valued at roughly $56.5451 million. Binance leads with 30,600 contracts worth $22.7472 million, representing 40.22% of the market. Bitget holds 22,800 contracts valued at $16.9722 million (30.01%), while OKX accounts for 5,747.07 contracts worth $4.279 million (7.56%). Together, these three platforms command 78% of the total open interest.