Micron Technology shares dropped 13% on Tuesday, their steepest single-day decline in recent memory, dragged down by a rout in South Korean semiconductor stocks. The selloff in memory chip rivals SK Hynix and Samsung on the KOSPI index triggered a wave of risk aversion that spilled over into U.S. trading.
The catalyst appears to be a broader KOSPI downturn rather than company-specific news from Micron itself. Barron's reported that the declines in SK Hynix and Samsung — two of the world's largest memory chip producers — prompted investors to reassess the entire sector's near-term outlook. The move came just ahead of Micron's scheduled earnings report, adding to the volatility.
A rout in chipmaker names weighed the S&P 500 and Nasdaq Composite lower on Tuesday, according to CNBC. The sector's weakness underscored how interconnected global memory markets have become, with weakness in Asia directly hammering U.S. semiconductor stocks.
While some traders had been pushing Micron's stock to new highs in anticipation of strong earnings, Tuesday's selloff suggests that even a stellar report may not be enough to reverse sector-wide pessimism. Analysts caution that the rout could be an overreaction tied to broader South Korean market jitters rather than a fundamental shift in memory chip demand.