The rupee today soared by 36 paise, its biggest single-day gain in four months, to close at two-week high 66.66 a dollar on easing worries of foreign fund outflows.

Investors and currency traders rejoiced as sentiment turned highly buoyant after the US Federal Reserve expectedly left the policy rate unchanged. The country’s current account deficit (CAD) narrowing sharply also boosted the sentiment.

The rupee spurted by a whopping 36 paise, or 0.54 per cent – its best one-day gain since May 25 — to settle at 66.66 a dollar.

The local currency resumed on a firm footing at 66.86 as compared to previous close of 67.02 at the Interbank Foreign Exchange (forex) market. It soared to intra-day high of 66.65 before concluding at 66.66.

The country’s current account deficit (CAD) narrowed sharply to just USD 300 million, or 0.1 per cent of GDP, in the June quarter, driven by lower trade deficit on deeper import contraction. A lower CAD provides stability to rupee.

The greenback lost further ground against major six currencies after the Federal Reserve held interest rate steady at 0.50 per cent, despite signaling that a rate hike is likely by December. The dollar index was down 0.16 per cent at 95.82.

Bank of Japan (BoJ) on Wednesday kept interest rates on hold at minus 0.1 per cent in an overhaul of its massive stimulus programme.

Meanwhile, RBI fixed the reference rate for the dollar at 66.8451 and euro at 75.0203.

In cross-currency trades, the rupee retreated sharply against the pound sterling to close at 87.07 from 86.79 and fell back against the euro and settled at 74.89 as compared to 74.67 yesterday.

It remained under pressure against the Japanese yen and ended at 66.22 from 66.12 per 100 yens earlier.