This column highlights the most useful and interesting business and financial commentary on technology every day.   NPR Link: How Much Is a 'Like' on Facebook Worth for a Company's Share Price? “It's not that Facebook (NASDAQ:FB) likes caused shares to rise or fall but the admiration a company gets on social media seems to be a good clue about stock market performance.   “Naturally people on Wall Street are interested and many of them are already buying so-called ‘sentiment feeds’ and folding them into the algorithms they use to buy and sell stocks. It's kind of like a ...