Oct 15 (Reuters) - The dollar rose to a one-month high against the Swiss franc on Tuesday as optimism that a deal to avert U.S. debt default would soon be reached dimmed appetite for safe-haven currencies. The dollar rose to 0.91455 francs, its highest level since September 18, and up 0.4 percent on the day. The dollar index was up 0.33 percent at 80.534.

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