Swine causes airline shares to fall

Among the shares of the U.S. carriers, industry leader Delta Air Lines fell almost 10 percent and US Airways Group fell 4 percent.

The swine flu was expected to cause customers to cancel travel plans, sending shares down in double-digit percentages on Monday, but on Tuesday most reports said travelers were largely keeping their current plans in place.

Cruise and hotel operators, which took a severe beating on Monday, bounced back, with Carnival Corp and Royal Caribbean Cruises Ltd up 3.9 percent and 3.3 percent, respectively.