Answer
- Firstly the FORMULA for Sharpes Ratio is : (Expected
Return - Rf) / Standard Deviation
- Now, the Interpretaion of this FORMULA is that "HOW
MUCH EXTRA RETURN" over and above Risk free Return our Portfolio is
Earning "PER UNIT OF RISK" that we are taking.
- We Deduct Risk Free Rate because that is what we can
earn otherwise also without entering into Market & without
taking any Risk.
- But now since we have Entered Market therefore we would
like to see that What is our Actual Return (ie ER - Rf) which would
reflect that this is the return we have got by taking this much
risk (ie. Std. Deviation)
- Sharpes Ratio of 1.08 Shows that our Portfolio is Actually Earning (ie
after deducting Rf) 1.08 unit For taking per unit of Risk.
In Other
Words, for every 1 unit of Risk (ie. standard deviation),
our Portfolio Earns 1.08 units of Extra Return.
- It basically shows the Reward (in times) that we are
getting by Investing in Market & taking a Risk.
- Suppose if we have not Invested in Market & rather
have invested in any Bank then we would have got Risk Free rate.
BUT now since we have Invested in Market which is RISKY hence we
need to measure that how much EXTRA are we getting for the RISK we
have taken by entering into Market.
HOPE IT HELPS. STILL IF NEED ANY FURTHER EXPLANATION OR
DOUBT PLEASE LET ME KNOW IN COMMENT :)