China SXT Pharmaceuticals (SXTC) stock whipsaws after AI “clinics” plan, with Friday open in focus

China SXT Pharmaceuticals Inc shares ended Thursday down 37.5% at $1.25 after swinging between $1.21 and $6.98, with volume jumping to about 109.3 million shares, Yahoo Finance data showed. The day before, the stock closed at $2.00 on roughly 115,000 shares.