USD vs INR, Jan. 2 -- The Indian rupee slipped past the 90 per US dollar mark on Friday, weighed down by sustained dollar demand and persistent foreign investor outflows.

During the morning session, the currency traded in a tight range and briefly appreciated by 6 paise to 89.92. However, traders noted that thin liquidity magnified normal demand-supply mismatches, keeping the rupee tilted toward depreciation. The rupee finally settled 22 paise down at 90.20.

On Thursday, January 1, the rupee had slipped by 10 paise, ending the session at 89.98 against the US dollar.

The Indian rupee depreciated against the US dollar amid the absence of key triggers, leaving markets without a clear direction.

Market participants noted that the dollar-r...