Modèle d’évaluation des immobilisations (CAPM)
Le modèle d’évaluation des immobilisations (MEDAF) indique quel devrait être le taux de rendement attendu ou requis pour les actifs risqués tels que les actions ordinaires de Western Digital.
Taux de rendement
Western Digital Corp., taux de rendement mensuels
| Western Digital Corp. (WDC) | Standard & Poor’s 500 (S&P 500) | |||||
|---|---|---|---|---|---|---|
| t | Date | PrixWDC,t1 | DividendeWDC,t1 | RWDC,t2 | PrixS&P 500,t | RS&P 500,t3 |
| 31 juil. 2017 | $85.12 | 2,470.30 | ||||
| 1. | 31 août 2017 | $88.27 | 3.70% | 2,471.65 | 0.05% | |
| 2. | 30 sept. 2017 | $86.40 | $0.50 | -1.55% | 2,519.36 | 1.93% |
| 3. | 31 oct. 2017 | $89.27 | 3.32% | 2,575.26 | 2.22% | |
| . | . | . | . | . | . | . |
| . | . | . | . | . | . | . |
| . | . | . | . | . | . | . |
| 70. | 31 mai 2023 | $38.73 | 12.46% | 4,179.83 | 0.25% | |
| 71. | 30 juin 2023 | $37.93 | -2.07% | 4,376.86 | 4.71% | |
| Moyenne (R): | -0.09% | 0.94% | ||||
| Écart type: | 13.54% | 5.05% | ||||
| Western Digital Corp. (WDC) | Standard & Poor’s 500 (S&P 500) | |||||
|---|---|---|---|---|---|---|
| t | Date | PrixWDC,t1 | DividendeWDC,t1 | RWDC,t2 | PrixS&P 500,t | RS&P 500,t3 |
| 31 juil. 2017 | $85.12 | 2,470.30 | ||||
| 1. | 31 août 2017 | $88.27 | 3.70% | 2,471.65 | 0.05% | |
| 2. | 30 sept. 2017 | $86.40 | $0.50 | -1.55% | 2,519.36 | 1.93% |
| 3. | 31 oct. 2017 | $89.27 | 3.32% | 2,575.26 | 2.22% | |
| 4. | 30 nov. 2017 | $78.86 | -11.66% | 2,647.58 | 2.81% | |
| 5. | 31 déc. 2017 | $79.53 | $0.50 | 1.48% | 2,673.61 | 0.98% |
| 6. | 31 janv. 2018 | $88.98 | 11.88% | 2,823.81 | 5.62% | |
| 7. | 28 févr. 2018 | $87.04 | -2.18% | 2,713.83 | -3.89% | |
| 8. | 31 mars 2018 | $92.27 | $0.50 | 6.58% | 2,640.87 | -2.69% |
| 9. | 30 avr. 2018 | $78.79 | -14.61% | 2,648.05 | 0.27% | |
| 10. | 31 mai 2018 | $83.51 | 5.99% | 2,705.27 | 2.16% | |
| 11. | 30 juin 2018 | $77.41 | $0.50 | -6.71% | 2,718.37 | 0.48% |
| 12. | 31 juil. 2018 | $70.15 | -9.38% | 2,816.29 | 3.60% | |
| 13. | 31 août 2018 | $63.24 | -9.85% | 2,901.52 | 3.03% | |
| 14. | 30 sept. 2018 | $58.54 | $0.50 | -6.64% | 2,913.98 | 0.43% |
| 15. | 31 oct. 2018 | $43.07 | -26.43% | 2,711.74 | -6.94% | |
| 16. | 30 nov. 2018 | $45.39 | 5.39% | 2,760.17 | 1.79% | |
| 17. | 31 déc. 2018 | $36.97 | $0.50 | -17.45% | 2,506.85 | -9.18% |
| 18. | 31 janv. 2019 | $44.99 | 21.69% | 2,704.10 | 7.87% | |
| 19. | 28 févr. 2019 | $50.30 | 11.80% | 2,784.49 | 2.97% | |
| 20. | 31 mars 2019 | $48.06 | $0.50 | -3.46% | 2,834.40 | 1.79% |
| 21. | 30 avr. 2019 | $51.12 | 6.37% | 2,945.83 | 3.93% | |
| 22. | 31 mai 2019 | $37.22 | -27.19% | 2,752.06 | -6.58% | |
| 23. | 30 juin 2019 | $47.55 | $0.50 | 29.10% | 2,941.76 | 6.89% |
| 24. | 31 juil. 2019 | $53.89 | 13.33% | 2,980.38 | 1.31% | |
| 25. | 31 août 2019 | $57.27 | 6.27% | 2,926.46 | -1.81% | |
| 26. | 30 sept. 2019 | $59.64 | 4.14% | 2,976.74 | 1.72% | |
| 27. | 31 oct. 2019 | $51.65 | $0.50 | -12.56% | 3,037.56 | 2.04% |
| 28. | 30 nov. 2019 | $50.33 | -2.56% | 3,140.98 | 3.40% | |
| 29. | 31 déc. 2019 | $63.47 | 26.11% | 3,230.78 | 2.86% | |
| 30. | 31 janv. 2020 | $65.50 | $0.50 | 3.99% | 3,225.52 | -0.16% |
| 31. | 29 févr. 2020 | $55.56 | -15.18% | 2,954.22 | -8.41% | |
| 32. | 31 mars 2020 | $41.62 | -25.09% | 2,584.59 | -12.51% | |
| 33. | 30 avr. 2020 | $46.08 | $0.50 | 11.92% | 2,912.43 | 12.68% |
| 34. | 31 mai 2020 | $44.37 | -3.71% | 3,044.31 | 4.53% | |
| 35. | 30 juin 2020 | $44.15 | -0.50% | 3,100.29 | 1.84% | |
| 36. | 31 juil. 2020 | $43.10 | -2.38% | 3,271.12 | 5.51% | |
| 37. | 31 août 2020 | $38.42 | -10.86% | 3,500.31 | 7.01% | |
| 38. | 30 sept. 2020 | $36.55 | -4.87% | 3,363.00 | -3.92% | |
| 39. | 31 oct. 2020 | $37.73 | 3.23% | 3,269.96 | -2.77% | |
| 40. | 30 nov. 2020 | $44.88 | 18.95% | 3,621.63 | 10.75% | |
| 41. | 31 déc. 2020 | $55.39 | 23.42% | 3,756.07 | 3.71% | |
| 42. | 31 janv. 2021 | $56.43 | 1.88% | 3,714.24 | -1.11% | |
| 43. | 28 févr. 2021 | $68.53 | 21.44% | 3,811.15 | 2.61% | |
| 44. | 31 mars 2021 | $66.75 | -2.60% | 3,972.89 | 4.24% | |
| 45. | 30 avr. 2021 | $70.63 | 5.81% | 4,181.17 | 5.24% | |
| 46. | 31 mai 2021 | $75.23 | 6.51% | 4,204.11 | 0.55% | |
| 47. | 30 juin 2021 | $71.17 | -5.40% | 4,297.50 | 2.22% | |
| 48. | 31 juil. 2021 | $64.93 | -8.77% | 4,395.26 | 2.27% | |
| 49. | 31 août 2021 | $63.20 | -2.66% | 4,522.68 | 2.90% | |
| 50. | 30 sept. 2021 | $56.44 | -10.70% | 4,307.54 | -4.76% | |
| 51. | 31 oct. 2021 | $52.29 | -7.35% | 4,605.38 | 6.91% | |
| 52. | 30 nov. 2021 | $57.84 | 10.61% | 4,567.00 | -0.83% | |
| 53. | 31 déc. 2021 | $65.21 | 12.74% | 4,766.18 | 4.36% | |
| 54. | 31 janv. 2022 | $51.74 | -20.66% | 4,515.55 | -5.26% | |
| 55. | 28 févr. 2022 | $50.94 | -1.55% | 4,373.94 | -3.14% | |
| 56. | 31 mars 2022 | $49.65 | -2.53% | 4,530.41 | 3.58% | |
| 57. | 30 avr. 2022 | $53.07 | 6.89% | 4,131.93 | -8.80% | |
| 58. | 31 mai 2022 | $60.69 | 14.36% | 4,132.15 | 0.01% | |
| 59. | 30 juin 2022 | $44.83 | -26.13% | 3,785.38 | -8.39% | |
| 60. | 31 juil. 2022 | $49.10 | 9.52% | 4,130.29 | 9.11% | |
| 61. | 31 août 2022 | $42.26 | -13.93% | 3,955.00 | -4.24% | |
| 62. | 30 sept. 2022 | $32.55 | -22.98% | 3,585.62 | -9.34% | |
| 63. | 31 oct. 2022 | $34.37 | 5.59% | 3,871.98 | 7.99% | |
| 64. | 30 nov. 2022 | $36.75 | 6.92% | 4,080.11 | 5.38% | |
| 65. | 31 déc. 2022 | $31.55 | -14.15% | 3,839.50 | -5.90% | |
| 66. | 31 janv. 2023 | $43.95 | 39.30% | 4,076.60 | 6.18% | |
| 67. | 28 févr. 2023 | $38.48 | -12.45% | 3,970.15 | -2.61% | |
| 68. | 31 mars 2023 | $37.67 | -2.10% | 4,109.31 | 3.51% | |
| 69. | 30 avr. 2023 | $34.44 | -8.57% | 4,169.48 | 1.46% | |
| 70. | 31 mai 2023 | $38.73 | 12.46% | 4,179.83 | 0.25% | |
| 71. | 30 juin 2023 | $37.93 | -2.07% | 4,376.86 | 4.71% | |
| Moyenne (R): | -0.09% | 0.94% | ||||
| Écart type: | 13.54% | 5.05% | ||||
Tout afficher
1 Données en dollars américains par action ordinaire, ajustées pour tenir compte des fractionnements et des dividendes en actions.
2 Taux de rendement des actions ordinaires de WDC au cours de la période t.
3 Taux de rendement de l’indice S&P 500 (l’indicateur du portefeuille de marché) au cours de la période t.
Variance et covariance
Western Digital Corp., calcul de la variance et de la covariance des rendements
| t | Date | RWDC,t | RS&P 500,t | (RWDC,t–RWDC)2 | (RS&P 500,t–RS&P 500)2 | (RWDC,t–RWDC)×(RS&P 500,t–RS&P 500) |
|---|---|---|---|---|---|---|
| 1. | 31 août 2017 | 3.70% | 0.05% | 14.40 | 0.78 | -3.34 |
| 2. | 30 sept. 2017 | -1.55% | 1.93% | 2.13 | 0.99 | -1.45 |
| 3. | 31 oct. 2017 | 3.32% | 2.22% | 11.67 | 1.65 | 4.38 |
| . | . | . | . | . | . | . |
| . | . | . | . | . | . | . |
| . | . | . | . | . | . | . |
| 70. | 31 mai 2023 | 12.46% | 0.25% | 157.51 | 0.47 | -8.63 |
| 71. | 30 juin 2023 | -2.07% | 4.71% | 3.89 | 14.27 | -7.45 |
| Total (Σ): | 12,838.63 | 1,786.26 | 2,894.84 | |||
| t | Date | RWDC,t | RS&P 500,t | (RWDC,t–RWDC)2 | (RS&P 500,t–RS&P 500)2 | (RWDC,t–RWDC)×(RS&P 500,t–RS&P 500) |
|---|---|---|---|---|---|---|
| 1. | 31 août 2017 | 3.70% | 0.05% | 14.40 | 0.78 | -3.34 |
| 2. | 30 sept. 2017 | -1.55% | 1.93% | 2.13 | 0.99 | -1.45 |
| 3. | 31 oct. 2017 | 3.32% | 2.22% | 11.67 | 1.65 | 4.38 |
| 4. | 30 nov. 2017 | -11.66% | 2.81% | 133.80 | 3.51 | -21.66 |
| 5. | 31 déc. 2017 | 1.48% | 0.98% | 2.49 | 0.00 | 0.07 |
| 6. | 31 janv. 2018 | 11.88% | 5.62% | 143.43 | 21.92 | 56.07 |
| 7. | 28 févr. 2018 | -2.18% | -3.89% | 4.35 | 23.33 | 10.08 |
| 8. | 31 mars 2018 | 6.58% | -2.69% | 44.59 | 13.14 | -24.20 |
| 9. | 30 avr. 2018 | -14.61% | 0.27% | 210.69 | 0.44 | 9.64 |
| 10. | 31 mai 2018 | 5.99% | 2.16% | 37.02 | 1.50 | 7.45 |
| 11. | 30 juin 2018 | -6.71% | 0.48% | 43.72 | 0.20 | 2.99 |
| 12. | 31 juil. 2018 | -9.38% | 3.60% | 86.20 | 7.11 | -24.76 |
| 13. | 31 août 2018 | -9.85% | 3.03% | 95.18 | 4.37 | -20.40 |
| 14. | 30 sept. 2018 | -6.64% | 0.43% | 42.87 | 0.26 | 3.32 |
| 15. | 31 oct. 2018 | -26.43% | -6.94% | 693.39 | 62.03 | 207.40 |
| 16. | 30 nov. 2018 | 5.39% | 1.79% | 30.04 | 0.72 | 4.66 |
| 17. | 31 déc. 2018 | -17.45% | -9.18% | 301.19 | 102.28 | 175.52 |
| 18. | 31 janv. 2019 | 21.69% | 7.87% | 474.69 | 48.06 | 151.04 |
| 19. | 28 févr. 2019 | 11.80% | 2.97% | 141.53 | 4.15 | 24.23 |
| 20. | 31 mars 2019 | -3.46% | 1.79% | 11.32 | 0.73 | -2.88 |
| 21. | 30 avr. 2019 | 6.37% | 3.93% | 41.75 | 8.97 | 19.35 |
| 22. | 31 mai 2019 | -27.19% | -6.58% | 734.24 | 56.45 | 203.59 |
| 23. | 30 juin 2019 | 29.10% | 6.89% | 852.13 | 35.49 | 173.90 |
| 24. | 31 juil. 2019 | 13.33% | 1.31% | 180.29 | 0.14 | 5.06 |
| 25. | 31 août 2019 | 6.27% | -1.81% | 40.53 | 7.53 | -17.47 |
| 26. | 30 sept. 2019 | 4.14% | 1.72% | 17.91 | 0.61 | 3.31 |
| 27. | 31 oct. 2019 | -12.56% | 2.04% | 155.37 | 1.23 | -13.80 |
| 28. | 30 nov. 2019 | -2.56% | 3.40% | 6.06 | 6.10 | -6.08 |
| 29. | 31 déc. 2019 | 26.11% | 2.86% | 686.53 | 3.70 | 50.39 |
| 30. | 31 janv. 2020 | 3.99% | -0.16% | 16.65 | 1.21 | -4.48 |
| 31. | 29 févr. 2020 | -15.18% | -8.41% | 227.45 | 87.36 | 140.96 |
| 32. | 31 mars 2020 | -25.09% | -12.51% | 624.80 | 180.84 | 336.14 |
| 33. | 30 avr. 2020 | 11.92% | 12.68% | 144.27 | 138.03 | 141.12 |
| 34. | 31 mai 2020 | -3.71% | 4.53% | 13.08 | 12.91 | -12.99 |
| 35. | 30 juin 2020 | -0.50% | 1.84% | 0.16 | 0.82 | -0.36 |
| 36. | 31 juil. 2020 | -2.38% | 5.51% | 5.22 | 20.92 | -10.45 |
| 37. | 31 août 2020 | -10.86% | 7.01% | 115.87 | 36.85 | -65.35 |
| 38. | 30 sept. 2020 | -4.87% | -3.92% | 22.78 | 23.61 | 23.19 |
| 39. | 31 oct. 2020 | 3.23% | -2.77% | 11.04 | 13.71 | -12.30 |
| 40. | 30 nov. 2020 | 18.95% | 10.75% | 362.69 | 96.41 | 186.99 |
| 41. | 31 déc. 2020 | 23.42% | 3.71% | 552.82 | 7.71 | 65.28 |
| 42. | 31 janv. 2021 | 1.88% | -1.11% | 3.89 | 4.20 | -4.04 |
| 43. | 28 févr. 2021 | 21.44% | 2.61% | 463.82 | 2.80 | 36.04 |
| 44. | 31 mars 2021 | -2.60% | 4.24% | 6.27 | 10.94 | -8.28 |
| 45. | 30 avr. 2021 | 5.81% | 5.24% | 34.89 | 18.55 | 25.44 |
| 46. | 31 mai 2021 | 6.51% | 0.55% | 43.65 | 0.15 | -2.56 |
| 47. | 30 juin 2021 | -5.40% | 2.22% | 28.12 | 1.65 | -6.82 |
| 48. | 31 juil. 2021 | -8.77% | 2.27% | 75.23 | 1.79 | -11.61 |
| 49. | 31 août 2021 | -2.66% | 2.90% | 6.61 | 3.85 | -5.05 |
| 50. | 30 sept. 2021 | -10.70% | -4.76% | 112.41 | 32.41 | 60.35 |
| 51. | 31 oct. 2021 | -7.35% | 6.91% | 52.69 | 35.74 | -43.40 |
| 52. | 30 nov. 2021 | 10.61% | -0.83% | 114.66 | 3.13 | -18.94 |
| 53. | 31 déc. 2021 | 12.74% | 4.36% | 164.77 | 11.73 | 43.97 |
| 54. | 31 janv. 2022 | -20.66% | -5.26% | 422.81 | 38.37 | 127.37 |
| 55. | 28 févr. 2022 | -1.55% | -3.14% | 2.11 | 16.58 | 5.91 |
| 56. | 31 mars 2022 | -2.53% | 3.58% | 5.95 | 6.98 | -6.44 |
| 57. | 30 avr. 2022 | 6.89% | -8.80% | 48.75 | 94.70 | -67.95 |
| 58. | 31 mai 2022 | 14.36% | 0.01% | 208.87 | 0.87 | -13.45 |
| 59. | 30 juin 2022 | -26.13% | -8.39% | 678.02 | 87.01 | 242.88 |
| 60. | 31 juil. 2022 | 9.52% | 9.11% | 92.52 | 66.84 | 78.64 |
| 61. | 31 août 2022 | -13.93% | -4.24% | 191.45 | 26.83 | 71.67 |
| 62. | 30 sept. 2022 | -22.98% | -9.34% | 523.62 | 105.58 | 235.13 |
| 63. | 31 oct. 2022 | 5.59% | 7.99% | 32.32 | 49.71 | 40.09 |
| 64. | 30 nov. 2022 | 6.92% | 5.38% | 49.26 | 19.71 | 31.16 |
| 65. | 31 déc. 2022 | -14.15% | -5.90% | 197.56 | 46.69 | 96.04 |
| 66. | 31 janv. 2023 | 39.30% | 6.18% | 1,552.10 | 27.45 | 206.42 |
| 67. | 28 févr. 2023 | -12.45% | -2.61% | 152.57 | 12.58 | 43.81 |
| 68. | 31 mars 2023 | -2.10% | 3.51% | 4.04 | 6.60 | -5.17 |
| 69. | 30 avr. 2023 | -8.57% | 1.46% | 71.92 | 0.28 | -4.48 |
| 70. | 31 mai 2023 | 12.46% | 0.25% | 157.51 | 0.47 | -8.63 |
| 71. | 30 juin 2023 | -2.07% | 4.71% | 3.89 | 14.27 | -7.45 |
| Total (Σ): | 12,838.63 | 1,786.26 | 2,894.84 | |||
Tout afficher
VarianceWDC = Σ(RWDC,t–RWDC)2 ÷ (71 – 1)
= 12,838.63 ÷ (71 – 1)
= 183.41
VarianceS&P 500 = Σ(RS&P 500,t–RS&P 500)2 ÷ (71 – 1)
= 1,786.26 ÷ (71 – 1)
= 25.52
CovarianceWDC, S&P 500 = Σ(RWDC,t–RWDC)×(RS&P 500,t–RS&P 500) ÷ (71 – 1)
= 2,894.84 ÷ (71 – 1)
= 41.35
Estimation systématique des risques (β)
| VarianceWDC | 183.41 |
| VarianceS&P 500 | 25.52 |
| CovarianceWDC, S&P 500 | 41.35 |
| Coefficient de corrélationWDC, S&P 5001 | 0.60 |
| βWDC2 | 1.62 |
| αWDC3 | -1.61% |
Calculs
1 Coefficient de corrélationWDC, S&P 500
= CovarianceWDC, S&P 500 ÷ (Écart typeWDC × Écart typeS&P 500)
= 41.35 ÷ (13.54% × 5.05%)
= 0.60
2 βWDC
= CovarianceWDC, S&P 500 ÷ VarianceS&P 500
= 41.35 ÷ 25.52
= 1.62
3 αWDC
= MoyenneWDC – βWDC × MoyenneS&P 500
= -0.09% – 1.62 × 0.94%
= -1.61%
Taux de rendement attendu
| Hypothèses | ||
| Taux de rendement de LT Treasury Composite1 | RF | 4.62% |
| Taux de rendement attendu du portefeuille de marché2 | E(RM) | 13.69% |
| Risque systématique lié à Western Digital actions ordinaires | βWDC | 1.62 |
| Taux de rendement attendu des actions ordinaires de Western Digital3 | E(RWDC) | 19.31% |
1 Moyenne non pondérée des rendements des offres sur tous les bons du Trésor américain à coupon fixe en circulation qui ne sont ni échus ni remboursables par anticipation dans moins de 10 ans (indicateur du taux de rendement sans risque).
3 E(RWDC) = RF + βWDC [E(RM) – RF]
= 4.62% + 1.62 [13.69% – 4.62%]
= 19.31%