Key Highlights

  • Sterling Infrastructure (NASDAQ:STRL) closed about 15% higher on November 9, 2026, one of the strongest gains among large US stocks as industrial and technology stocks led a broad rebound.
  • Flex (NASDAQ:FLEX) rose as much as 12.9% intraday ahead of its Innovation Day on November 10, where it is presenting both its core Business and the planned spin-off of its cloud and power unit, to be named Axiom.
  • Sterling's third-quarter Revenue reached USD 1.56 billion, up 127%, with Earnings of USD 7.58 per share, and it raised 2026 revenue guidance to USD 4.63 billion to USD 4.73 billion.
  • Flex's Cloud and Power Infrastructure revenue grew 54% to USD 2.51 billion in its September quarter, and the company raised its full-year adjusted earnings outlook to USD 4.84 to USD 5.16 per share.

What Drove the Moves

Both stocks are direct plays on the physical build-out of AI capacity, and both had been caught in the previous week's selloff in AI-linked names. When the market rebounded on November 9, with industrials the strongest S&P 500 sector, money flowed back quickly. Sterling Infrastructure (NASDAQ:STRL) builds site development and civil works for data centers and advanced Manufacturing plants through its E-Infrastructure segment, which has driven its growth. Flex manufactures power, cooling and rack systems for hyperscale operators. Neither company issued new results on the day, so the gains reflect a repricing of existing growth rather than fresh data. For Flex, positioning ahead of Innovation Day added to the move, as investors expect detail on the Axiom separation and longer-term targets. The rebound was broad, but stocks with direct exposure to AI construction and hardware Supply recorded some of the sharpest gains of the session.

What the Numbers Show

Sterling's latest quarter, reported on October 28, beat expectations on both lines, with revenue of USD 1.56 billion and earnings of USD 7.58 per share. Alongside higher guidance, it raised its 2026 Net Income outlook to USD 596 million to USD 604 million and completed USD 133.34 million of buybacks. Flex posted revenue of USD 8.49 billion, up 24.8%, and adjusted earnings of USD 1.18 per share, up 49.4%, in its fiscal second quarter. Its cloud and power segment lifted its adjusted Operating Margin by 240 basis points to 10.7%, and management now expects that segment to grow 75% to 85% this fiscal year. These are the businesses investors were paying for on Monday. Strong execution in the most recent quarter gave buyers a reason to step back in once the selling pressure eased.

Risks and What to Watch

Big one-day moves in both directions show how sensitive these stocks are to sentiment on AI spending. Sterling Infrastructure (NASDAQ:STRL) depends on a concentrated group of large Data Center customers, and any pause in project starts would hit its backlog. Political pressure on data center power use is a further risk. Flex is spending USD 1.5 billion to USD 1.6 billion on capital projects this fiscal year and had USD 5.21 billion of long-term Debt at September 25, 2026, so execution on the spin-off and on returns from that spending matters. The next markers are Flex's Innovation Day presentations on November 10 and any updates to Sterling's Backlog and margins.

Where Things Stand

Sterling Infrastructure gained about 15% and Flex rose as much as 12.9% intraday on November 9, 2026 as AI infrastructure stocks rebounded with the wider market. Both have strong recent results and raised guidance. The gains restore part of last week's losses, but both stocks remain tied to the pace of data center spending, and Flex's Innovation Day is the next near-term catalyst.