U.S. stocks ended the day with a mixed-to-firmer tone as buyers and sellers fought it out. The market was helped by strength in semiconductors and a rebound in AI-related names after Micron’s stronger earnings outlook. The broader market tone was more constructive, but the gains were not evenly distributed.Major indices:Dow: Outperformed, helped by broader value/cyclical support.S&P 500: Little changed to modestly higher, with gains capped by uneven sector performance.Nasdaq: Firmer, led by renewed buying in semiconductors and AI-linked shares.Russell 2000: Higher, helped by improved risk sentiment, but still sensitive to yields and Fed expectations.Key stock drivers:Micron was the headline catalyst. Strong AI memory demand helped lift the semiconductor space and gave the broader tech sector a needed boost. The question now is whether the AI trade can broaden again, or whether today’s move remains concentrated in a handful of chip names.Shares of Micron, closed higher by 15.74% to $1213.56. In contrast, shares of Apple fell after raising prices on a range of products as a result of higher chip costs. If the price of chips start to be passed onto consumers, another bout of inflation may be just around the corner. Shares of Apple today had their worst day since April of last years. The price tumbled and closed down -$17.93 or -6.12% to $275.15. The equity market is trying to rebuild upside momentum, but Fed uncertainty remains a ceiling. Stronger labor data and sticky inflation keep the market wary that rates may stay higher for longer — or that another hike remains a risk.Some of the larger losers today included:Strategy (MSTR) — -9.37% to close at $85.31Apple (AAPL) — -6.12% to close at $275.15Ross Stores (ROST) — -5.89% to close at $215.13Dell Technologies (DELL) — -5.81% to close at $408.85Palantir Technologies (PLTR) — -5.45% to close at $107.32Coinbase Global (COIN) — -5.06% to close at $142.52Alibaba ADR (BABA) — -4.69% to close at $95.12Chewy (CHWY) — -4.58% to close at $18.14Albemarle (ALB) — -4.54% to close at $141.13Wynn Resorts (WYNN) — -4.17% to close at $99.42AppLovin (APP) — -4.11% to close at $445.85Some of the oversized winners included:SanDisk (SNDK): +21.97% to $2,335.00Micron (MU): +15.95% to $1,215.79Corning (GLW): +10.84% to $228.14Lam Research (LRCX): +7.21% to $401.81Caterpillar (CAT): +6.34% to $1,057.49Deere & Company (DE): +5.01% to $630.83Western Digital (WDC): +4.90% to $675.39Ciena Corp (CIEN): +4.63% to $484.98ASML Holding ADR (ASML): +4.52% to $1,842.45FedEx (FDX): +4.05% to $329.65ARK Genomic Revolution ETF (ARKG): +4.04% to $40.14Merck & Co. (MRK): +4.03% to $125.46 This article was written by Greg Michalowski at investinglive.com.