December 25, 2001 |
Two California companies that make systems to detect weapons saw their shares surge Monday after the arrest of a passenger who allegedly tried to blow up a plane on a transatlantic flight Saturday. InVision Technologies Inc., based in Newark, Calif., makes machines that scan baggage for the presence of explosives. Its shares rose $4.20, or 15%, to $32.71 on Nasdaq as investors bet sales will increase. The stock has soared tenfold since Sept. 11. OSI Systems Inc.
March 30, 2012 |
The next big stock tip might be as close as a Twitter feed. Professional traders are developing computer programs that scour Internet posts in search of the next stock market darling. Their technology analyzes everything uttered about a company - good or bad, racy or mundane - and spits out trading recommendations. The logic is that the popular sentiment expressed by millions of people on sites such as Twitter and Facebook yields investment clues that can't be gleaned from financial statements or analyst reports.