A Taiwan stock trader mistakenly bought T$7.9 billion ($251 million) worth of shares with a mis-stroke of her computer, meaning her company is looking at a paper loss of more than $12 million and she is looking for a new job. The trader with Fubon Securities mis-keyed in a small order from Merrill Lynch Monday, creating confusion when many small firms inexplicably surged the 7 percent trading limit. "Something like this is difficult to explain to superiors," a Fubon executive said Tuesday. Fubon said that the trader was unfamiliar with new computer systems and would be fired. "There is a...