融劵回補

融劵回補: short covering == buy to cover == buyback
short position

融券軋空: short squeeze

long squeeze

"...
A long squeeze, which involves a single stock, occurs when a sudden drop in price incites further selling, pressuring long holders of the stock into selling their shares to protect against a dramatic loss. Less popular than its more famous brother, the short squeeze, long squeezes are most apt to be found in smaller, more illiquid stocks
..."
http://www.investopedia.com/terms/l/longsqueeze.asp