WDC is trading at $624.19 (7.6% down) today, pressured by a broader tech selloff, AI-cost concerns, and recent company-specific developments. - The decline aligns with a weaker Nasdaq and general weakness across the semiconductor industry as investors weigh AI infrastructure costs and profit-taking after a strong recent rally. - The stock is also facing downward pressure from the finalization of a SanDisk share-swap transaction on June 22, 2026, and equity dilution from the retirement of convertible notes. - The stock experienced a sharp pre-market decline from its prior close of $675.39 amid heightened volatility in the chip sector.