The rupee depreciated 23 paise to 72.92 against the US dollar in opening trade on Wednesday amid a muted trend in the domestic equity market and strengthening American currency.

At the interbank forex market, the domestic unit opened at 72.90 against the US dollar, then lost further ground and touched 72.92, registering a fall of 23 paise over its previous close.

On Tuesday, the rupee had settled at 72.69 against the American currency.

Meanwhile, the dollar index, which gauges the greenback's strength against a basket of six currencies, advanced 0.17 per cent to 90.66.

"FPI flows into the domestic markets could cap the depreciation bias of the local unit," Reliance Securities said in a research note.

Meanwhile, Asian currencies are weak this morning and could weigh on sentiments, the note added.

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