Facebook's US stock price, which continued its steady climb up to a high of US$194 per share in early February, suddenly tumbled, reversed course and descended to a low of US$157 per share by April 6. The drop in Facebook's market capitalization for a few days in March reached as much as US$100 billion, a little less than our foreign reserves. Facebook appears to not be the only tech share following this downward trend. The share price of other US