[U.S. Stock Crypto Reserve Companies Decline Across the Board, ABTC Drops Over 17%] On September 4, U.S. stock crypto reserve companies saw widespread declines, with American Bitcoin (ABTC) dropping 17.2%, ALT5 Sigma (ALTS) falling 15.18%, and SharpLink Gaming (SBET) down 7.77%. Previously, Nasdaq tightened its scrutiny of listed companies investing in cryptocurrencies, requiring detailed disclosures and potentially conducting special reviews of frequent trading activities.