Jefferies Group, the investment bank that helped rescue Knight Capital Group, dropped the most in 10 months yesterday after reporting revenue and earnings that fell short of estimates excluding gains from the deal.

Shares of Jefferies declined 7.3 percent after the bell to $14.52. The company posted net income for the three months ended Aug. 31 of $70.2 million, or 31 cents a share. Earnings adjusted for the Knight Capital transaction were 24 cents a share, compared with the average estimate by analysts of 26 cents.

Jefferies helped arrange a $400 million bailout for Knight Capital earlier this year after trading losses spurred by a software failure.

“Absent Knight, it was a revenue miss,” said analyst Jeff Harte. Jefferies’s fixed-income trading revenue missed Harte’s estimate of $278 million.