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Capital Asset Pricing Model (CAPM)
Intermediate level
Capital asset pricing model (CAPM) indicates what should be the expected or required rate of return on risky assets like Abbott Laboratories’s common stock.
Rates of Return
Abbott Laboratories, monthly rates of return
| Abbott Laboratories (ABT) | Standard & Poor’s 500 (S&P 500) | |||||
|---|---|---|---|---|---|---|
| t | Date | PriceABT,t1 | DividendABT,t1 | RABT,t2 | PriceS&P 500,t | RS&P 500,t3 |
| Jan 31, 2015 | ||||||
| 1. | Feb 28, 2015 | |||||
| 2. | Mar 31, 2015 | |||||
| 3. | Apr 30, 2015 | |||||
| . | . | . | . | . | . | . |
| . | . | . | . | . | . | . |
| . | . | . | . | . | . | . |
| 58. | Nov 30, 2019 | |||||
| 59. | Dec 31, 2019 | |||||
| Average: | ||||||
| Standard deviation: | ||||||
| Abbott Laboratories (ABT) | Standard & Poor’s 500 (S&P 500) | |||||
|---|---|---|---|---|---|---|
| t | Date | PriceABT,t1 | DividendABT,t1 | RABT,t2 | PriceS&P 500,t | RS&P 500,t3 |
| Jan 31, 2015 | ||||||
| 1. | Feb 28, 2015 | |||||
| 2. | Mar 31, 2015 | |||||
| 3. | Apr 30, 2015 | |||||
| 4. | May 31, 2015 | |||||
| 5. | Jun 30, 2015 | |||||
| 6. | Jul 31, 2015 | |||||
| 7. | Aug 31, 2015 | |||||
| 8. | Sep 30, 2015 | |||||
| 9. | Oct 31, 2015 | |||||
| 10. | Nov 30, 2015 | |||||
| 11. | Dec 31, 2015 | |||||
| 12. | Jan 31, 2016 | |||||
| 13. | Feb 29, 2016 | |||||
| 14. | Mar 31, 2016 | |||||
| 15. | Apr 30, 2016 | |||||
| 16. | May 31, 2016 | |||||
| 17. | Jun 30, 2016 | |||||
| 18. | Jul 31, 2016 | |||||
| 19. | Aug 31, 2016 | |||||
| 20. | Sep 30, 2016 | |||||
| 21. | Oct 31, 2016 | |||||
| 22. | Nov 30, 2016 | |||||
| 23. | Dec 31, 2016 | |||||
| 24. | Jan 31, 2017 | |||||
| 25. | Feb 28, 2017 | |||||
| 26. | Mar 31, 2017 | |||||
| 27. | Apr 30, 2017 | |||||
| 28. | May 31, 2017 | |||||
| 29. | Jun 30, 2017 | |||||
| 30. | Jul 31, 2017 | |||||
| 31. | Aug 31, 2017 | |||||
| 32. | Sep 30, 2017 | |||||
| 33. | Oct 31, 2017 | |||||
| 34. | Nov 30, 2017 | |||||
| 35. | Dec 31, 2017 | |||||
| 36. | Jan 31, 2018 | |||||
| 37. | Feb 28, 2018 | |||||
| 38. | Mar 31, 2018 | |||||
| 39. | Apr 30, 2018 | |||||
| 40. | May 31, 2018 | |||||
| 41. | Jun 30, 2018 | |||||
| 42. | Jul 31, 2018 | |||||
| 43. | Aug 31, 2018 | |||||
| 44. | Sep 30, 2018 | |||||
| 45. | Oct 31, 2018 | |||||
| 46. | Nov 30, 2018 | |||||
| 47. | Dec 31, 2018 | |||||
| 48. | Jan 31, 2019 | |||||
| 49. | Feb 28, 2019 | |||||
| 50. | Mar 31, 2019 | |||||
| 51. | Apr 30, 2019 | |||||
| 52. | May 31, 2019 | |||||
| 53. | Jun 30, 2019 | |||||
| 54. | Jul 31, 2019 | |||||
| 55. | Aug 31, 2019 | |||||
| 56. | Sep 30, 2019 | |||||
| 57. | Oct 31, 2019 | |||||
| 58. | Nov 30, 2019 | |||||
| 59. | Dec 31, 2019 | |||||
| Average: | ||||||
| Standard deviation: | ||||||
Show all
1 Data in US$ per share of common stock, adjusted for splits and stock dividends.
2 Rate of return on common stock of ABT during period t
3 Rate of return on S&P 500 (the market portfolio proxy) during period t
Systematic Risk (β) Estimation
| VarianceABT | |
| VarianceS&P 500 | |
| CovarianceABT, S&P 500 | |
| Correlation coefficientABT, S&P 5001 | |
| βABT2 | |
| αABT3 |
Calculations
1 Correlation coefficientABT, S&P 500
= CovarianceABT, S&P 500 ÷ (Standard deviationABT × Standard deviationS&P 500)
= ÷ ( × )
2 βABT
= CovarianceABT, S&P 500 ÷ VarianceS&P 500
= ÷
3 αABT
= AverageABT – βABT × AverageS&P 500
= – ×
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 Abbott Laboratories’s common stock | βABT | |
| Expected rate of return on Abbott Laboratories’s common stock3 | E(RABT) | |
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).
3 E(RABT) = RF + βABT [E(RM) – RF]
= + [ – ]
=