Short sale halt for A123 Systems as stock price tumbles
Troubled lithium-ion battery maker A123 Systems is in serious trouble, AONE's stock price has fallen steeply for the last month, the NASDAQ has warned the company could be delisted, and now the SEC has put a halt on short sales of AONE due aggressive short selling.
A "short sale" is a kind of stock trade where the "investor" sells shares of stock he or she does not own, and the seller must eventually replace the shorted shares. Short sales are a bet by a short seller that the stock price will go down, and short sales tend to put a downward pressure on stock prices. In February 2010, the SEC adopted a new rule, the "alternate uptick rule", which is designed to restrict short selling from further driving down the stock price. The rule is triggered when the price of a stock falls by more than 10% from the previous days close. The restriction gives precedence to long sellers over short sellers to sell their shares.
AONE's stock price has declined steeply from $1.62 per share on June 27, 2012, to $0.22 today. The current phase of AONE's stock slump began on August 9 shortly before the rescue of A123 Systems by Wanxiang was announced. On Tuesday AONE closed at $0.24 and this morning the stock price immediately fell to $0.23 and in the middle of the day it had fallen as low as $0.215 but by the end of the day the price recovered to $0.22 per share. That rapid decline is what triggered the alternate uptick rule.