Kalshi just had its second-biggest day ever, as the prediction market platform eclipsed $700 million in trading volume on Saturday. 

The only day bigger in Kalshi history was on Feb. 8, when it saw $871 million in volume on the day of the Super Bowl.

More than 92% of the $700.6 million in volume on Saturday came on sports and parlays, which are bets that are based on the outcomes of multiple events. Parlays , called “combos” by most prediction markets mostly consist of sports events. About $189 million of that volume came on parlays.

A good deal of Kalshi’s recent growth has come from an uptick in parlays. Kalshi launched parlays last fall.

Here’s another way to get a grasp of the growth of both Kalshi and the combo category. Total volume at Kalshi in September was about $2.9 billion. Kalshi has already seen $2.6 billion in combo volume in April and looks like it should eclipse $3 billion just on parlays.