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Capital Asset Pricing Model (CAPM)

Difficulty: Intermediate

Capital asset pricing model (CAPM) indicates what should be the expected or required rate of return on risky assets like Express Scripts's common stock.


Rates of Return

Express Scripts Holding Co., monthly rates of return

 
Express Scripts Holding Co. (ESRX) Standard & Poor's 500 (S&P 500)
t Date PriceESRX,t1 DividendESRX,t1 RESRX,t2 PriceS&P 500,t RS&P 500,t3
Jan 31, 2013
1. Feb 28, 2013 % %
2. Mar 31, 2013 % %
3. Apr 30, 2013 % %
. . . . . . .
. . . . . . .
. . . . . . .
58. Nov 30, 2017 % %
59. Dec 31, 2017 % %
Average: % %
Standard Deviation: % %
Express Scripts Holding Co. (ESRX) Standard & Poor's 500 (S&P 500)
t Date PriceESRX,t1 DividendESRX,t1 RESRX,t2 PriceS&P 500,t RS&P 500,t3
Jan 31, 2013
1. Feb 28, 2013 % %
2. Mar 31, 2013 % %
3. Apr 30, 2013 % %
4. May 31, 2013 % %
5. Jun 30, 2013 % %
6. Jul 31, 2013 % %
7. Aug 31, 2013 % %
8. Sep 30, 2013 % %
9. Oct 31, 2013 % %
10. Nov 30, 2013 % %
11. Dec 31, 2013 % %
12. Jan 31, 2014 % %
13. Feb 28, 2014 % %
14. Mar 31, 2014 % %
15. Apr 30, 2014 % %
16. May 31, 2014 % %
17. Jun 30, 2014 % %
18. Jul 31, 2014 % %
19. Aug 31, 2014 % %
20. Sep 30, 2014 % %
21. Oct 31, 2014 % %
22. Nov 30, 2014 % %
23. Dec 31, 2014 % %
24. Jan 31, 2015 % %
25. Feb 28, 2015 % %
26. Mar 31, 2015 % %
27. Apr 30, 2015 % %
28. May 31, 2015 % %
29. Jun 30, 2015 % %
30. Jul 31, 2015 % %
31. Aug 31, 2015 % %
32. Sep 30, 2015 % %
33. Oct 31, 2015 % %
34. Nov 30, 2015 % %
35. Dec 31, 2015 % %
36. Jan 31, 2016 % %
37. Feb 29, 2016 % %
38. Mar 31, 2016 % %
39. Apr 30, 2016 % %
40. May 31, 2016 % %
41. Jun 30, 2016 % %
42. Jul 31, 2016 % %
43. Aug 31, 2016 % %
44. Sep 30, 2016 % %
45. Oct 31, 2016 % %
46. Nov 30, 2016 % %
47. Dec 31, 2016 % %
48. Jan 31, 2017 % %
49. Feb 28, 2017 % %
50. Mar 31, 2017 % %
51. Apr 30, 2017 % %
52. May 31, 2017 % %
53. Jun 30, 2017 % %
54. Jul 31, 2017 % %
55. Aug 31, 2017 % %
56. Sep 30, 2017 % %
57. Oct 31, 2017 % %
58. Nov 30, 2017 % %
59. Dec 31, 2017 % %
Average: % %
Standard Deviation: % %

Show All

1 Data in USD $ per share of common stock, adjusted for splits and stock dividends.

2 Rate of return on common stock of ESRX during period t

3 Rate of return on S&P 500 (the market portfolio proxy) during period t

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Systematic Risk (β) Estimation

 
VarianceESRX
VarianceS&P 500
CovarianceESRX, S&P 500
Correlation CoefficientESRX, S&P 5001
βESRX2
αESRX3

Calculations

1 CovarianceESRX, S&P 500 ÷ (Standard DeviationESRX × Standard DeviationS&P 500)
= ÷ ( × )

2 CovarianceESRX, S&P 500 ÷ VarianceS&P 500
= ÷

3 AverageESRX – βESRX × AverageS&P 500
= ×

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Expected Rate of Return

 
Assumptions
Rate of return on LT Treasury Composite1 RF %
Expected rate of return on market portfolio2 E(RM) %
Systematic risk (β) of Express Scripts's common stock βESRX
Expected rate of return on Express Scripts's common stock3 E(RESRX) %

1 Unweighted average of bid yields on all outstanding fixed-coupon U.S. Treasury bonds neither due or callable in less than 10 years (risk-free rate of return proxy).

Calculations

2 See Details »

3 E(RESRX) = RF + βESRX [E(RM) – RF]
= % + [% – %]
= %

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