On January 13, 2024, from November 29 to December 6, 2024, mysterious traders on Wall Street bought nearly 180,000 call options on the Direxion Daily FTSE China Bull 3X Shares ETF (code YINN). In addition, on December 2 last year, they also bought about 210,000 call options on the Direxion Daily CSI 300 China A Shares Bull 2x Shares (code CHAU). Among them, CHAU did twice more than the CSI 300 index, and YINN did three times more than the FTSE China A50 index. After buying calls on the two small ETFs in early December, the trader briefly made floating profits of more than $100 million, but appeared to squaring the positions on Friday in a nearly equal loss-making position. The contracts saw a surge in volume on Friday, with about 200,000 YINN and CHAU calls trading at an average of $5.57 each and nearly 250,000 CHAU calls trading at an average of $0.78 each.