US equity markets closed lower on Monday, with the S&P 500 and Nasdaq Composite retreating as selling pressure in large-cap technology stocks overwhelmed broader market resilience.
Alphabet led the decline among megacap names, contributing to a risk-off tone that persisted through the session.
Investors remained cautious, balancing domestic equity weakness against external geopolitical uncertainties.
The sell-off in technology shares reflects ongoing sensitivity to valuation levels and growth expectations within the sector.
As the largest constituents of the Nasdaq, declines in names like Alphabet exert disproportionate influence on index performance.
The move underscores how concentrated market leadership can amplify volatility when sentiment shifts, even in the absence of a single domestic catalyst.