Woofun AI data shows that total open interest for SPY contracts across all platforms reaches approximately 75,900 shares, valued at $56.5451 million. Market liquidity is heavily concentrated among the top three venues: Binance, Bitget, and OKX.

Binance holds the largest portion with 30,600 shares worth $22.7472 million, representing 40.22% of the total. Bitget accounts for 30.01% with 22,800 shares valued at $16.9722 million, while OKX holds 5,747.07 shares worth $4.279 million, making up 7.56% of the market.