Tolerance Band

Empirical estimates of the Reserve Bank of India's (RBI) intervention reaction function suggest that the central bank actively intervenes in the foreign exchange market to contain volatility but this intervention is neither continuous nor linear. It is better described by a nonlinear policy reaction function with a target range as opposed to a point target. It responds much more vigorously to appreciating or depreciating pressure outside the target range but the response is much more muted within the range. Moreover, the tolerance band is asymmetric i.e., the RBI responds much more strongly to appreciating pressure than depreciating pressure. Such a policy response in an era of continuous net capital inflows accounts for the large build-up in foreign exchange reserves witnessed in India in the recent past.

Empirical estimates of the Reserve Bank of India's (RBI) intervention reaction function suggest that the central bank actively intervenes in the foreign exchange market to contain volatility but this intervention is neither continuous nor linear. It is better described by a nonlinear policy reaction function with a target range as opposed to a point target. It responds much more vigorously to appreciating or depreciating pressure outside the target range but the response is much more muted within the range. Moreover, the tolerance band is asymmetric i.e., the RBI responds much more strongly to appreciating pressure than depreciating pressure. Such a policy response in an era of continuous net capital inflows accounts for the large build-up in foreign exchange reserves witnessed in India in the recent past.

Empirical estimates of the Reserve Bank of India's (RBI) intervention reaction function suggest that the central bank actively intervenes in the foreign exchange market to contain volatility but this intervention is neither continuous nor linear. It is better described by a nonlinear policy reaction function with a target range as opposed to a point target. It responds much more vigorously to appreciating or depreciating pressure outside the target range but the response is much more muted within the range. Moreover, the tolerance band is asymmetric i.e., the RBI responds much more strongly to appreciating pressure than depreciating pressure. Such a policy response in an era of continuous net capital inflows accounts for the large build-up in foreign exchange reserves witnessed in India in the recent past.

A precise determination of tolerance bands of S-N curves is quite difficult problem; therefore simple approximate constructions of these bands are often used. Castillo et al. suggested a sophisticated and at the same time easy procedure for their estimation which, however, needs a special type of regression function for describing S-N curve. This type of regression function called the Castillo function is suitable only for high-cycle fatigue region close to fatigue limit. The paper focuses on other regression functions used in the Castillo procedure, namely on the Kohout and Vechet function and the Stromeyer function.

The build up of international reserves by many Asian countries over the last decade or so has attracted widespread interest and debate. This paper seeks to make a contribution to this discussion from the point of view of India. The empirical results are designed to identify the extent to which the accumulation of reserves in India has been driven by two motives which are commonly identified with respect to the recent accumulation of reserves by the Asian EMEs, namely a demand to have insurance against external shocks and a demand to have a high level of export competitiveness, so as to have export-led growth. Our results provide evidence in support of both the motives in explaining India’s international reserves accumulation strategy, although, their relative importance does seem to vary overtime depending on external factors. This in turn offers some helpful insights into the causes and likely future path of the global imbalances.

Empirical estimates of the Reserve Bank of India's (RBI) intervention reaction function suggest that the central bank actively intervenes in the foreign exchange market to contain volatility but this intervention is neither continuous nor linear. It is better described by a nonlinear policy reaction function with a target range as opposed to a point target. It responds much more vigorously to appreciating or depreciating pressure outside the target range but the response is much more muted within the range. Moreover, the tolerance band is asymmetric i.e., the RBI responds much more strongly to appreciating pressure than depreciating pressure. Such a policy response in an era of continuous net capital inflows accounts for the large build-up in foreign exchange reserves witnessed in India in the recent past.► Reserve Bank of India (RBI) actively intervenes in the foreign exchange market. ► Intervention is better described by a nonlinear policy reaction function with a target rang...