Interactive Brokers Group Inc (NASDAQ: IBKR) shares climbed 10% to $23.71 after the firm said its profit surged, due largely to increased trading activity in its electronic brokerage unit. The firm earned 34 cents per share last quarter, compared with 14 cents per share in the prior quarter. Analysts polled by Thomson Reuters had expected earnings of 30 cents a share. Share volume was 272,000, compared to an all-day average of 538,000
