Turning now to the other price of money, namely the exchange rate, in a speech in Singapore last month, Reserve Bank of India (RBI) Governor Raghuram Rajan emphasised that "depreciation in the rupee essentially matches inflation differentials and therefore anybody who invests at rupee rates gets appropriate returns to match the kind of depreciation risk that they have taken": in other words, the exchange rate for the Indian rupee is determined by the good old purchasing power parity theory of exchange rates. I have some major reservations on the argument made:
- Empirical evidence does not support that inflation differential is the sole - or even the primary - determinant of the exchange rates, even on a year-to-year basis.
- The Real Effective Exchange Rate index prepared by the International Monetary Fund (and used by Rajan in his Ramnath Goenka lecture in March) evidences a rupee appreciation of 20 per cent from September 2013 to January 2016, clearly not what PPP needs.
- The very fact that the foreign portfolio investor (FPI) quota in the bond market was not fully used recently as prospects of a rate cut have dimmed suggests that the FPIs' primary objective is not so much the yield or inflation differential as capital gains through interest rate movements. In fact, the popularity of "carry trades" in currency markets, and also with Indian companies with foreign currency debt, suggests that in the era of a liberal capital account, exchange rate levels, on their own, do not move to reflect inflation/interest rate differentials, even over years.
In the article, he also spells out his idea of an ideal exchange rate: "It is the 'Goldilocks rate' produced by market forces, with RBI focusing on attracting long-term capital inflows and intervening only to maintain orderly movement of the rupee versus other currencies." Is this a realistic proposition?
To come back to another term for Rajan, the recent intemperate letter from Subramanian Swamy and the cult status he seems to have assumed among business leaders would probably ensure the government offers him one. If he decides to accept the offer, will he undertake a zero-based review of both the monetary and exchange rate policies before the ever-increasing NPAs and net external liabilities overwhelm us?
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