1. Robinhood prediction markets saw 3.9 billion event contracts in May, with an annualized revenue of approximately $470 million;
2. A whale increased its 50x short position on SP500 to $147 million, with floating profit of $1.4 million;
3. Yonhap News: South Korean retail investors borrow to bottom-fish in stocks;
4. Polymarket lists "Will SpaceX's stock open higher on its first trading day?";
5. Kalshi's contract trading volume inflated? Kalshi's crypto head's remarks questioned by Polymarket team members;
6. An address suspected to be linked to Justin Sun withdraws 12,000 ETH from Poloniex, worth $19.5 million;
7. WLFI team deposits another 177 million tokens into Binance, worth $9.73 million;
8. Polymarket is about to launch the combos feature.