Newton Interpolating Polynomial
S&P 500®'s Defined Data.
| Date Closed | X Point |
Y (Closing Value) |
|---|---|---|
| Aug 1, 2021 | 1 | 4,522.68 |
| Sep 1, 2021 | 2 | 4,307.54 |
| Oct 1, 2021 | 3 | 4,605.38 |
| Nov 1, 2021 | 4 | 4,567.00 |
| Dec 1, 2021 | 5 | 4,766.18 |
| Jan 1, 2022 | 6 | 4,515.55 |
| Feb 1, 2022 | 7 | 4,373.79 |
| Mar 1, 2022 | 8 | 4,530.41 |
| Apr 1, 2022 | 9 | 4,131.93 |
| May 1, 2022 | 10 | 4,132.15 |
| Jun 1, 2022 | 11 | 3,785.38 |
| Jul 1, 2022 | 12 | 4,130.29 |
| Aug 1, 2022 | 13 | 3,955.00 |
| Sep 1, 2022 | 14 | 3,585.62 |
| Oct 1, 2022 | 15 | 3,871.98 |
| Nov 1, 2022 | 16 | 4,080.11 |
| Dec 1, 2022 | 17 | 3,839.50 |
| Jan 1, 2023 | 18 | 4,076.60 |
| Feb 1, 2023 | 19 | 3,970.15 |
| March 1, 2023 | 20 | 4,109.31 |