Shares of Plug Power (NASDAQ: PLUG) rose on Tuesday after the hydrogen fuel cell maker lifted its full-year growth targets. Missed Nvidia in 2009? This Rare Signal Is Flashing Again. In 2009, a "Double Down" signal flashed for a little-known chipmaker called Nvidia. For the first time in…This story appeared on finance.yahoo.com , 2026-08-12 01:51:14.