Wall Street is solidly higher this afternoon amid a myriad of Wall Street optimism. Tech stocks are extending their recent rally, as artificial intelligence (AI) names pop after President Donald Trump revealed a joint venture to invest "$500 billion, at least," for AI infrastructure in the U.S. Upbeat fourth-quarter earnings reports are also adding to today's momentum.

The S&P 500 Index (SPX) scored an intraday record high earlier in the session, while the Dow Jones Industrial Average (DJI) and Nasdaq Composite Index (IXIC) both boast triple-digit leads at last check. All three indexes are heading for their third straight win.

United Airlines Holdings Inc (Nasdaq: UAL) is modestly higher at $110.95 at last check, but earlier hit an all-time high of $116, after the airline giant reported better-than-expected earnings of $3.26 per share on revenues of $14.70 billion for the fourth quarter. Options traders are excited about the results, with 33,000 calls and 26,000 puts -- 4 times the average intraday volume -- traded so far. Most popular is the January 120 call, followed closely by the 105 put from the same standard series. UAL is up 13.2% in 2025, with a 171.5% year-over-year lead to boot.

Semiconductor stock Arm Holdings PLC - ADR (Nasdaq: ARM) is one of the best stocks on the Nasdaq this afternoon, up 14.9% at $178.30 at last glance getting a halo lift from the joint venture agreement with Oracle, OpenAI, and SoftBank. Barclays also hiked its price target on ARM to $155, citing strong AI chip demand and the firm's market position. Year over year, Arm stock is up 133.4%.

Shares of enterprise software company Agilysys Inc (Nasdaq: AGYS) are on track for their worst single-day percentage loss since February 2006, last seen down 19.8% at $100.98. The stock is one of the worst on the Nasdaq today, as bear notes roll in after the company lowered its sales outlook amid a drop in profits. Needham and Oppenheimer cut their target prices on Agilysys stock to $125 and $135, respectively. Year to date, AGYS is already down 24.1%.

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