The dollar held its sharpest gain in a week on Wednesday, amid concerns over the situation in the Middle East.The US dollar index rose about 0.5% overnight to 101.2, its largest rise since Sept. 25.Early Asia moves were slight, leaving the euro below $1.10.The yen was broadly steady at 143.45 per dollar and the Swiss franc at 0.8463 per dollar.The New Zealand dollar was nursing a 1.1% overnight fall at $0.6283.The Australian dollar was down to $0.6883.Sterling fell 0.7% overnight and was steady at $1.3278 in early Asia trade.Source: Qatar News Agency