May 18 (Reuters) - India's NSE index fell more than 1 percent on Thursday, its biggest one-day fall in four months, as investors locked in profits on recent gains and as global markets were hit over swirling political uncertainty in the United States.

The broader NSE index lost 1.01 percent to end at 9,429.45, posting its biggest fall since Jan. 20. The benchmark BSE index closed down 0.73 percent at 30,434.79, its biggest fall since May 5.

Both indexes had hit record highs in each of the previous three sessions.

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