One set ofMargincomments at aSell-Sidewebcast sent ModineManufacturing(NYSE:MOD) plunging on Monday, September 28, and knocked Vertiv (NYSE:VRT), EMCOR (NYSE:EME) and Comfort Systems (NYSE:FIX) lower in a test of the AI data-center boom.
SpaceX (NASDAQ:SPCX)'s giant Starship rocket reached orbit for the first time, yet the company's shares slipped slightly on Monday, September 28, as a broad selloff and multi-year-high bond yields outweighed a landmark engineering moment.
● Primech Holdings (PMEC) traded down by roughly a sixth during Monday's session, according to an intraday movers list.
● Modine fell 11.63% to $175.04 on Monday, while Vertiv, a larger data-center cooling supplier, closed down 3.65% at $244.04.
● ModineManufacturingclosed at $175.04 on Monday, down 11.63% from $198.07, one of the sharpest declines among mid-sized US stocks.
Shares of Green Circle Decarbonize Technology (NYSE American:GCDT), a penny stock, ended Monday, September 28, 2026 lower by 28.36%, at $0.48. The small company trades on NYSE American following a comparatively recent initial public offering.
● Cheetah NetSupplyChain (CTNT) fell about a quarter on Monday, according to market data, with no confirmed closing price.
On Monday, September 28, 2026, Cheetah Net Supply Chain Service (NASDAQ:CTNT), a penny stock, dropped 23.81% to finish at $3.60. The small, US-listed company has limited public float and light trading liquidity.
● Vertiv (VRT) closed at $244.04 on Monday, down 3.65% from $253.28, as a smaller cooling peer sold off sharply.
● BingEx (FLX) traded near $1.35, up about 15%, during Monday's session, according to a movers list.