Stock Market capitalization Trailing-12-month return as of Aug. 12 Aehr Test Systems Inc. (ticker: AEHR) $4.1 billion 564% Enliven Therapeutics Inc. (ELVN) $4.3 billion 207% Erasca Inc. (ERAS) $6.4 billion 1,091% Iridium Communications Inc. (IRDM) $5.3 billion 102% Maase Inc. (MAAS) $6.9 billion 364% Sezzle Inc. (SEZL) $4.4 billion 41% Twist Bioscience Corp. (TWST) $7.8 billion 356% The company admittedly has little revenue let alone profits, but shares have tripled over the last 12 months because of long-term optimism about the stock. AI stocks are already volatile, and smaller companies even more so; when you throw in the uncertainty that comes with investing in an overseas company, the volatility jumps even more.