ACHR-WT Archer Aviation WT (NYSE) after hours -512% 20 Jan 2026: Watch liquidity

ACHR-WT stock plunged in after-hours trading to -6.52 USD, showing a reported -512.66% move on 20 Jan 2026 in the United States (NYSE) session. The sharp decline followed heavy volume of 51,250,252 shares and a gap from the prior close of 1.58 USD. This note reviews what the move means for liquidity, warrants pricing, technical indicators and valuation as investors digest unusual pricing behavior. We use Meyka AI as an AI-powered market analysis platform to compare technicals, fundamentals and model forecasts for Archer Aviation Inc. WT (ACHR-WT) on the NYSE.