GENERAC Holdings shares surged 33 percent Thursday after announcing an $8 billion backup-power agreement with Amazon for data center facilities. The deal positions Generac as a critical supplier to Amazon's AI infrastructure expansion at a time when power reliability has become a bottleneck for hyperscalers scaling compute capacity.
Fluence Energy shares plummeted 16 percent after cutting its annual revenue forecast to $2.4 billion from $3.1 billion. The energy storage company's revised guidance signals softening demand in the battery storage market, a sharp contrast to bullish Wall Street projections for AI-driven power infrastructure spending.
Homebuilder Lennar fell more than 2 percent after reducing home delivery projections for the second time, citing persistent interest rate headwinds. The repeated cut underscores how elevated borrowing costs continue to suppress demand and extend construction timelines.
Nebius gained 8 percent on a price increase announcement, lifting peers Iren and CoreWeave.
The S&P 500 fell 0.4 percent to 7,552. The Dow Jones dropped 1.2 percent to 51,462. The Nasdaq was flat at 25,978, and the Russell 2000 declined 0.4 percent to 2,859.
Amazon shares traded down 1.0 percent to $245.96.
