Stock Analysis on Net

Apple Inc. (NASDAQ:AAPL)

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Capital Asset Pricing Model (CAPM)

Microsoft Excel

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

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Rates of Return

Apple Inc., monthly rates of return

Microsoft Excel
Apple Inc. (AAPL) Standard & Poor’s 500 (S&P 500)
t Date PriceAAPL,t1 DividendAAPL,t1 RAAPL,t2 PriceS&P 500,t RS&P 500,t3
Oct 31, 2019
1. Nov 30, 2019
2. Dec 31, 2019
3. Jan 31, 2020
. . . . . . .
. . . . . . .
. . . . . . .
70. Aug 31, 2025
71. Sep 30, 2025
Average (R):
Standard deviation:
Apple Inc. (AAPL) Standard & Poor’s 500 (S&P 500)
t Date PriceAAPL,t1 DividendAAPL,t1 RAAPL,t2 PriceS&P 500,t RS&P 500,t3
Oct 31, 2019
1. Nov 30, 2019
2. Dec 31, 2019
3. Jan 31, 2020
4. Feb 29, 2020
5. Mar 31, 2020
6. Apr 30, 2020
7. May 31, 2020
8. Jun 30, 2020
9. Jul 31, 2020
10. Aug 31, 2020
11. Sep 30, 2020
12. Oct 31, 2020
13. Nov 30, 2020
14. Dec 31, 2020
15. Jan 31, 2021
16. Feb 28, 2021
17. Mar 31, 2021
18. Apr 30, 2021
19. May 31, 2021
20. Jun 30, 2021
21. Jul 31, 2021
22. Aug 31, 2021
23. Sep 30, 2021
24. Oct 31, 2021
25. Nov 30, 2021
26. Dec 31, 2021
27. Jan 31, 2022
28. Feb 28, 2022
29. Mar 31, 2022
30. Apr 30, 2022
31. May 31, 2022
32. Jun 30, 2022
33. Jul 31, 2022
34. Aug 31, 2022
35. Sep 30, 2022
36. Oct 31, 2022
37. Nov 30, 2022
38. Dec 31, 2022
39. Jan 31, 2023
40. Feb 28, 2023
41. Mar 31, 2023
42. Apr 30, 2023
43. May 31, 2023
44. Jun 30, 2023
45. Jul 31, 2023
46. Aug 31, 2023
47. Sep 30, 2023
48. Oct 31, 2023
49. Nov 30, 2023
50. Dec 31, 2023
51. Jan 31, 2024
52. Feb 29, 2024
53. Mar 31, 2024
54. Apr 30, 2024
55. May 31, 2024
56. Jun 30, 2024
57. Jul 31, 2024
58. Aug 31, 2024
59. Sep 30, 2024
60. Oct 31, 2024
61. Nov 30, 2024
62. Dec 31, 2024
63. Jan 31, 2025
64. Feb 28, 2025
65. Mar 31, 2025
66. Apr 30, 2025
67. May 31, 2025
68. Jun 30, 2025
69. Jul 31, 2025
70. Aug 31, 2025
71. Sep 30, 2025
Average (R):
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 AAPL during period t

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


Variance and Covariance

Apple Inc., calculation of variance and covariance of returns

Microsoft Excel
t Date RAAPL,t RS&P 500,t (RAAPL,tRAAPL)2 (RS&P 500,tRS&P 500)2 (RAAPL,tRAAPL)×(RS&P 500,tRS&P 500)
1. Nov 30, 2019
2. Dec 31, 2019
3. Jan 31, 2020
. . . . . . .
. . . . . . .
. . . . . . .
70. Aug 31, 2025
71. Sep 30, 2025
Total (Σ):
t Date RAAPL,t RS&P 500,t (RAAPL,tRAAPL)2 (RS&P 500,tRS&P 500)2 (RAAPL,tRAAPL)×(RS&P 500,tRS&P 500)
1. Nov 30, 2019
2. Dec 31, 2019
3. Jan 31, 2020
4. Feb 29, 2020
5. Mar 31, 2020
6. Apr 30, 2020
7. May 31, 2020
8. Jun 30, 2020
9. Jul 31, 2020
10. Aug 31, 2020
11. Sep 30, 2020
12. Oct 31, 2020
13. Nov 30, 2020
14. Dec 31, 2020
15. Jan 31, 2021
16. Feb 28, 2021
17. Mar 31, 2021
18. Apr 30, 2021
19. May 31, 2021
20. Jun 30, 2021
21. Jul 31, 2021
22. Aug 31, 2021
23. Sep 30, 2021
24. Oct 31, 2021
25. Nov 30, 2021
26. Dec 31, 2021
27. Jan 31, 2022
28. Feb 28, 2022
29. Mar 31, 2022
30. Apr 30, 2022
31. May 31, 2022
32. Jun 30, 2022
33. Jul 31, 2022
34. Aug 31, 2022
35. Sep 30, 2022
36. Oct 31, 2022
37. Nov 30, 2022
38. Dec 31, 2022
39. Jan 31, 2023
40. Feb 28, 2023
41. Mar 31, 2023
42. Apr 30, 2023
43. May 31, 2023
44. Jun 30, 2023
45. Jul 31, 2023
46. Aug 31, 2023
47. Sep 30, 2023
48. Oct 31, 2023
49. Nov 30, 2023
50. Dec 31, 2023
51. Jan 31, 2024
52. Feb 29, 2024
53. Mar 31, 2024
54. Apr 30, 2024
55. May 31, 2024
56. Jun 30, 2024
57. Jul 31, 2024
58. Aug 31, 2024
59. Sep 30, 2024
60. Oct 31, 2024
61. Nov 30, 2024
62. Dec 31, 2024
63. Jan 31, 2025
64. Feb 28, 2025
65. Mar 31, 2025
66. Apr 30, 2025
67. May 31, 2025
68. Jun 30, 2025
69. Jul 31, 2025
70. Aug 31, 2025
71. Sep 30, 2025
Total (Σ):

Show all

VarianceAAPL = Σ(RAAPL,tRAAPL)2 ÷ (71 – 1)
= ÷ (71 – 1)
=

VarianceS&P 500 = Σ(RS&P 500,tRS&P 500)2 ÷ (71 – 1)
= ÷ (71 – 1)
=

CovarianceAAPL, S&P 500 = Σ(RAAPL,tRAAPL)×(RS&P 500,tRS&P 500) ÷ (71 – 1)
= ÷ (71 – 1)
=


Systematic Risk (β) Estimation

Microsoft Excel
VarianceAAPL
VarianceS&P 500
CovarianceAAPL, S&P 500
Correlation coefficientAAPL, S&P 5001
βAAPL2
αAAPL3

Calculations

1 Correlation coefficientAAPL, S&P 500
= CovarianceAAPL, S&P 500 ÷ (Standard deviationAAPL × Standard deviationS&P 500)
= ÷ ( × )
=

2 βAAPL
= CovarianceAAPL, S&P 500 ÷ VarianceS&P 500
= ÷
=

3 αAAPL
= AverageAAPL – βAAPL × AverageS&P 500
= ×
=


Expected Rate of Return

Microsoft Excel
Assumptions
Rate of return on LT Treasury Composite1 RF
Expected rate of return on market portfolio2 E(RM)
Systematic risk (β) of Apple Inc. common stock βAAPL
 
Expected rate of return on Apple Inc. common stock3 E(RAAPL)

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).

2 See details »

3 E(RAAPL) = RF + βAAPL [E(RM) – RF]
= + []
=