-- The dollar rose slightly against the yen but fell versus the euro Wednesday as traders remained cautious ahead of a closely watched speech by the head of the Chicago Federal Reserve in the United States The dollar was trading at 109.94 yen on the Tokyo foreign exchange market at 3 p.m. Wednesday, up 0.18 yen from late Tuesday and above the 109.65 yen it bought in New York later that day. The euro rose to $1.2478 from $1.2453 late Tuesday. In U.S. trading Tuesday, the dollar did the opposite -- falling versus the yen but advancing against the euro and most other European currencies -- helped by a rise in Treasury yields and the return of crude oil futures prices below the levels they had been before Hurricane Katrina hit the U.S. Gulf Coast. The dollar was hit hard last week, breaking out of its summertime range versus the euro as fear mounted that the economic damage from Katrina could cause the Fed to pause with its rate hikes. Traders were hesitant to place big bets before a speech Wednesday by Chicago Fed President Michael Moskow, which might include hints on U.S. interest rates. Sentiment toward the dollar is lukewarm, Japanese traders said. "The extent of the damage from Hurricane Katrina on the economy is still unclear, and we can't continue to buy dollars unreservedly," said Masaki Fukui, senior vice president of foreign exchange at Mizuho Corporate Bank.