Tokyo stocks gave up early gains and ended the morning trading lower Thursday, pressured by mounting worries about corporate earnings in Japan. The Nikkei 225 Stock Average declined 78.93 points, or 0.59 per cent, to 13,288.86. The broader Topix index of all first-section issues was down 12.62 points, or 0.97 per cent, to 1,290.37. The Tokyo market opened higher after Wall Street's overnight gains, but investors' anxiety over Japanese firms' earnings later dampened the sentiment. On currency markets at 9 am (0000 GMT), the dollar was quoted at 108.11-16 yen, up from Wednesday's 5 pm quote of 107.94-95 yen. The euro was quoted at 1.5581-86 dollars, down from Wednesday's 5 pm quote of 1.5604-05 dollars, and at 168.48-53 yen, up from 168.44- 48 yen.
