Pre-market: 6227.T AIMECHATEC (JPX) down 20.41% 28 Feb 2026: watch JPY19,500

The 6227.T stock plunged 20.41% pre-market on 28 Feb 2026 to JPY19,500.00, led by heavy intraday selling and volume roughly 1,734,100.00 shares. This sharp drop followed a recent multi-month rally where the share price hit a year high JPY23,650.00, leaving momentum indicators overbought and traders taking profits. In this pre-market top losers note we break down valuation, technical levels, Meyka AI grading and a short checklist of risks ahead of the next earnings date on 20 May 2026. Our tone is analytical and actionable for JPX-traded investors in Japan.