max yasunaga business and management. risk-adjusted measure of return that is used to evaluate the...
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Finding Sharpe Ratio
Max YasunagaBusiness and Management
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Finding Sharpe Ratio
Risk-adjusted measure of return that is used to evaluate the performance of a portfolio.
The idea of the ratio is to see how much additional return an investor receives for the additional unit of volatility compared to a risk-free asset
Definition
Purpose
How
[Return on portfolio – risk free rate] / Standard Deviation of portfolio
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Finding Sharpe Ratio
Step 1Retrieve historical prices of the stocks you want to analyze from Yahoo Finance
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Finding Sharpe Ratio
Step 1Retrieve historical prices of the stocks you want to analyze from Yahoo Finance
Step 2Open the file, and delete the highlighted section, leaving only Adj Close and Date. Rename Goog instead of AdjClose.Sort the dates so that they are ascending and not descending.
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Finding Sharpe Ratio
Step 1Retrieve historical prices of the stocks you want to analyze from Yahoo Finance
Step 3
Open the file, and delete the highlighted section, leaving only Adj Close and Date. Rename Goog instead of AdjClose.Sort the dates so that they are ascending and not descending.
Do the same for all stocks and place the data side by side with GOOG.
Step 2
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Finding Sharpe Ratio
Step 4Find the average expected rate of return. This can be done by finding all the expected returns and then averaging it. Expected return can be found by taking the difference of the prices and dividing it by the previous price. Example: [(B3-B2)/B2]*100%.
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Finding Sharpe Ratio
Step 4Find the average expected rate of return. This can be done by finding all the expected returns and then averaging it. Expected return can be found by taking the difference of the prices and dividing it by the previous price. Example: [(B3-B2)/B2]*100%.
Below Average Expected Return, find Variance and Standard Deviation. Variance is defined as the average of the squared differences from the Mean and Standard Deviation is the squared root of Variance.
Step 5
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Finding Sharpe RatioStep 4Find the average expected rate of return. This can be done by finding all the expected returns and then averaging it. Expected return can be found by taking the difference of the prices and dividing it by the previous price. Example: [(B3-B2)/B2]*100%.
Below Average Expected Return, find Variance and Standard Deviation. Variance is defined as the average of the squared differences from the Mean and Standard Deviation is the squared root of Variance.
Step 5
Build a variance covariance matrix, which finds the total variance of the portfolio
Step 6
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The diagonal values (a1&a1, a2&a2) are found by finding the variance of GOOG and AAPL respectively. The values (a2&a1, a1&a2) are found by taking the covariance of GOOG and AAPL.
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Finding Sharpe Ratio
Now lets side step. To the side, do the carry out image 15
Step 7
Step 8Now find variance of the portfolio, which will be used to find Sharpe Ratio. Explained in image 16
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Now type 0.5 and 0.5 next to a1/goog, and a2/aapl. These are the weights. This is where Solver will feed back how we should appropriate our portfolio. And then next to total, type =(highlight cell with 0.5) + (highlight cell with other 0.5). If you are analyzing three stocks, then you will do the same steps we did above, except change the numbers 0.5 & 0.5. Total should always sum up to 1.
Next to Var port, type =MMULT(TRANSPOSE(…(A)highlight the two 0.5’s in step 15…),MMULT(…(B)highlight everything in the box we made…,…repeat (A) in here…)) Instead of pressing enter, you hold control shift + enter, and you will get the variance of the portfolio.
(A) (B)
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Finding Sharpe Ratio
Now lets side step. To the side, do the carry out image 15
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Step 8Now find variance of the portfolio, which will be used to find Sharpe Ratio. Explained in image 16
Step 9Type “Return (port)” all the way to “Sharpe Ratio” as shown in image 17
Step 10Find Return on Portfolio explained in image 18
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To find Return on your portfolio, take the expected Rate of Return of stock A for example (which you have found earlier) and multiply the weight distribution to that stock.=weighted average1 * average1 + weighted average2*average2
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Finding Sharpe Ratio
Step 11Fill in variance of the portfolio, found earlier, and Standard deviation, which is the squared root of the variance.
Step 12Fill in R(port) – rf. Find rf, the yield of a US treasury bond, which we will take as 1/365 (per day).
Step 13Fill in the Sharpe ratio, which is the [R(port)-rf] / SD(port
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Finding Sharpe Ratio
Step 14Find ultimate weighting by using Solver on excel as shown in image 22.
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Image 22 Go to tools=> solver, and click on it.
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Finding Sharpe Ratio
Step 14Find ultimate weighting by using Solver on excel as shown in image 22.
Step 15Fill in parameters as shown in image 23.
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First step is to set the objective. Our objective is maximizing sharpe ratio. So we’ll highlight that cell.
Then we have To Max, Min, etc. In this scenario, we want to Maximize, so we choose Max.
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What are you changing? You’re changing the weight you give to the stock you’re investing in. The amount you invest in the stock. $L$508 is the value of 0.5 next to a1/goog. $L$509 is the value below that. $L$510 is the value of 1.
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Click solve. And voila! Now try to make the strongest combinations of stocks, and maximize your SHARPE RATIOS