6666.T down 12.09% intraday on JPX: River Eletec tests support at JPY 698.00

River Eletec’s 6666.T stock fell 12.09% intraday to JPY 698.00 on 21 Mar 2026 on the JPX, making it one of Tokyo’s top intraday losers. Trading opened at JPY 771.00 and hit a day low of JPY 689.00 as volume surged to 397,500.00 shares. The move follows weak sentiment around near-term earnings and pushes the share price closer to its 50-day average of JPY 551.70. We examine fundamentals, technicals, and Meyka AI model forecasts to explain the sell-off and outline key levels for traders and investors. Sources: River Eletec website and JPX.