Nikkei down over 3 pct, banks and exporters fall

TOKYO, April 21 (Reuters) - Japan's Nikkei stock average fell 3.4 percent on Tuesday as a surge of bad loans at Bank of America revived fears about the U.S. financial system and economy, while a stronger yen hit exporters such as Canon Inc (7751.T). Banks fell and with tech shares also slid in the wake of worse-than-expected results from IBM (IBM.N). The benchmark Nikkei .N225 shed 299.06 points to 8,625.69, while the broader Topix .TOPX lost 3.3 percent to 820.18. (Reporting by Elaine Lies)