US equities retreated sharply on Sunday as technology stocks led a broad-based selloff, with the NASDAQ declining 2.01% to close at 21,647.61 and the S&P 500 shedding 1.51% to 6,506.48. The tech-heavy composite bore the brunt of profit-taking, signaling investor caution ahead of key economic data and Federal Reserve communications scheduled for the week. The blue-chip Dow Jones index proved more resilient, falling just 0.96% to 45,577.47, reflecting the outperformance of defensive and industrially-focused equities. Volume data pointed to institutional repositioning rather than capitulation selling, with sector rotation continuing to favor value names at the expense of mega-cap growth holdings that have dominated the year's rally.

Asian markets exhibited surprising resilience amid the North American headwinds, with South Korea's KOSPI edging 0.31% higher to 5,781.20 and the growth-oriented KOSDAQ surging 1.58% to 1,161.52. The outperformance of the small-cap index suggests investors maintained appetite for riskier exposures in the region, possibly reflecting optimism around semiconductor earnings cycles and tech supply chain normalization. The Korean won strengthened 1.01% against the dollar, reaching 1,504.83 KRW per USD, indicating capital inflows into the region despite global equity turbulence. This currency movement underscores divergent monetary policy expectations between the Federal Reserve and the Bank of Korea, with market participants pricing in a potentially more hawkish stance from the Fed amid persistent inflation concerns.

The bifurcated market performance underscores persistent regional divergence and shifting sentiment on growth trajectories. US markets are grappling with valuation concerns as higher-for-longer interest rate expectations weigh on terminal rate assumptions, while Asian exchanges benefit from their relative valuation discount and positive earnings momentum in export-dependent sectors. The 2% drawdown in the NASDAQ marks the largest single-day percentage loss in three weeks, though intraday support levels held above 21,400, suggesting underlying demand remains intact for oversold positions. Market participants should monitor Monday's session closely for sustained momentum or mean-reversion buying, particularly given the extended rally in US indices through early March.