The rupee plunged to a record low on Wednesday on heavy dollar demand by importers and as traders fretted over mixed signals from the central bank over its efforts to prop up the currency without choking off economic growth.
The rupee fell nearly 2 per cent to a record low of 64.54 to the dollar despite what traders said was sporadic Reserve Bank of India intervention in both the spot and forward markets.
It hovered in a range of 63.10 to 64.45 per dollar to close at an all-time low of 64.11.
Measures by the Reserve Bank of India late on Tuesday to support longer-dated credit sent prices of beaten-down bonds sharply higher but also led traders to question the central bank's resolve in defending the currency.
Since mid-July, the RBI has taken steps to tighten cash conditions, which have failed to support the rupee but sent bond yields surging, posing a fresh threat to the already cooling economy.
"Currency market and participants may consider it as a reversal of RBI liquidity tightening measures to prevent currency volatility; thus some pressure on currency may re-emerge," said Anjali Verma, economist at PhillipCapital.
With a record high current account deficit at 4.8 per cent of gross domestic product, India is especially vulnerable to funds moving away from emerging markets in anticipation of a winding back of the US Federal Reserve's stimulus programme.
Traders were looking ahead for clues from Fed minutes to be released later on Wednesday.
Deutsche Bank said in a note on Wednesday that the rupee could slide to 70 in a month or so, although some revival is expected by the end of the year.
The central bank's move to ease cash conditions after tightening them last month to support the rupee highlights the growing costs to the economy of stabilising the currency.
"The bearishness seen across markets is largely a reflection of the fact that there is no quick fix solution to arrest the rupee fall," said Shakti Satapathy, fixed income strategist at AK Capital.
The yield on the benchmark 10-year bond tumbled as much as 69 basis points on Wednesday to 8.21 per cent as its price rose.
It was last trading at 8.46 per cent, still down 44