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Thursday, April 30, 2009

Value At Risk

Probability of Non-Occurance

68.30%

90.00%

95.50%

99.70%

Confidence Level

84.00%

95.00%

97.50%

99.90%

1 DAY

49.8850

49.8950

49.8800

49.9100

49.8500

49.8400

49.8550

49.8250

10 DAYS

49.9150

49.9950

50.0150

50.0650

49.8200

49.7400

49.7200

49.6700

15 DAYS

49.9500

50.0200

50.0350

50.1150

49.7850

49.7150

49.7000

49.6200

Spot Rate basis : 49.865 Volatility per annum : 1.5%

Value at Risk (VaR) is a Risk Management and a Management Concept and is defined as an estimate of potential loss in a position or asset or portfolio of assets over a given holding period at a given level of certainty. Thus VaR measures the probability of loss for a given period of time over which the position is held while the given time period could vary from one day to a week to a month or a year. This VaR will change if the holding period of an instrument/position is changed which of course depends on the liquidity of the instrument/market.

Thus, VaR measures potential loss and not potential gain. This Loss might arise out of an unexpected happening but the maximum amount of loss that might be sustained can be determined mathematically at varying degrees of certainty for a given range of volatility per annum. These varying levels of confidence use different Standard Deviations and are depicted in the chart below :



STANDARD DEVIATION PROBABILITY OF NON-OCCURANCE LEVEL OF CONFIDENCE
1 68.3% 84%
1.65 90% 95%
2 95.5% 97.5%
3 99.7% 99.9%


A Table is compiled below showing the Risk of a Loss in U.S.Dollar Vs. Indian Rupee if it held on for a period of One Day, 10 Days and 15 Days at all the aforementioned levels of confidence. This Table is dynamic and continually calculates both the upside and downside rates that the USD/INR might attain at the specified probability and at the present volatility of the currency. The Base Rate on which it is calculated is mentioned on top of the Table and the Volatility is automatically generated from our Real-Time Prices.


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