By Tom Westbrook SINGAPORE (Reuters) – The dollar headed for a second weekly gain in a row on Friday on signs of resilience in the U.S. economy and caution about rate cuts from central bankers. Weekly gains on the risk-sensitive Australian and New Zealand dollars of 1.7% and 2.1% are set to be the largest since November and June respectively. Markets price a 57% chance of a U.S. rate cut in March, down from 75% a week ago. The dollar index is up 0.9% to 103.4 on the week and at 148.12 yen the dollar is up almost 5% on the Japanese currency this year as confidence that the Bank of Japan (BOJ) i…

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