NIKE INC 10-K form for the fiscal year ended 2018-05-31, page 48: 
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|  2 | NIKE, Inc. Consolidated Statements of Shareholders' Equity |


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|  2 |                                                                                   | Common Stock |    | Capital inExcessof StatedValue |    | AccumulatedOtherComprehensiveIncome |    | RetainedEarnings |       | Total |      |      |    |        |     |        |        |     |        |    |       |    |    |       |    |        |
|  3 |                                                                                   | Class A      |    | Class B                        |    |                                     |    |                  |       |       |      |      |    |        |     |        |        |     |        |    |       |    |    |       |    |        |
|  4 | (In millions, except per share data)                                              | Shares       |    | Amount                         |    | Shares                              |    | Amount           |       |       |      |      |    |        |     |        |        |     |        |    |       |    |    |       |    |        |
|  5 | Balance at May 31, 2015                                                           | 355          |    |                                | $  | -                                   |    |                  | 1,357 |       |      | $    | 3  |        |     | $      | 4,165  |     |        | $  | 1,246 |    | $  | 7,293 | $  | 12,707 |
|  6 | Stock options exercised                                                           |              |    |                                |    | 22                                  |    |                  |       |       | 680  |      |    |        |     |        |        | 680 |        |    |       |    |    |       |    |        |
|  7 | Conversion to Class B Common Stock                                                | (2           | )  |                                | -  |                                     |    | 2                |       |       | -    |      |    |        |     |        |        |     |        | -  |       |    |    |       |    |        |
|  8 | Repurchase of Class B Common Stock                                                |              |    |                                |    | (55                                 | )  |                  |       |       | (148 | )    |    |        |     | (3,090 | )      |     | (3,238 | )  |       |    |    |       |    |        |
|  9 | Dividends on common stock ($0.62 per share) and preferred stock ($0.10 per share) |              |    |                                |    |                                     |    |                  |       |       |      |      |    | (1,053 | )   |        | (1,053 | )   |        |    |       |    |    |       |    |        |
| 10 | Issuance of shares to employees, net of shares withheld for employee taxes        |              |    |                                |    | 3                                   |    |                  |       |       | 105  |      |    |        |     | (11    | )      |     | 94     |    |       |    |    |       |    |        |
| 11 | Stock-based compensation                                                          |              |    |                                |    |                                     |    |                  |       | 236   |      |      |    |        |     |        | 236    |     |        |    |       |    |    |       |    |        |
| 12 | Net income                                                                        |              |    |                                |    |                                     |    |                  |       |       |      |      |    | 3,760  |     |        | 3,760  |     |        |    |       |    |    |       |    |        |
| 13 | Other comprehensive income (loss)                                                 |              |    |                                |    |                                     |    |                  |       |       |      | (928 | )  |        |     |        | (928   | )   |        |    |       |    |    |       |    |        |
| 14 | Balance at May 31, 2016                                                           | 353          |    |                                | $  | -                                   |    |                  | 1,329 |       |      | $    | 3  |        |     | $      | 5,038  |     |        | $  | 318   |    | $  | 6,899 | $  | 12,258 |
| 15 | Stock options exercised                                                           |              |    |                                |    | 17                                  |    |                  |       |       | 525  |      |    |        |     |        |        | 525 |        |    |       |    |    |       |    |        |
| 16 | Conversion to Class B Common Stock                                                | (24          | )  |                                | -  |                                     |    | 24               |       |       | -    |      |    |        |     |        |        |     |        | -  |       |    |    |       |    |        |
| 17 | Repurchase of Class B Common Stock                                                |              |    |                                |    | (60                                 | )  |                  |       |       | (189 | )    |    |        |     | (3,060 | )      |     | (3,249 | )  |       |    |    |       |    |        |
| 18 | Dividends on common stock ($0.70 per share) and preferred stock ($0.10 per share) |              |    |                                |    |                                     |    |                  |       |       |      |      |    | (1,159 | )   |        | (1,159 | )   |        |    |       |    |    |       |    |        |
| 19 | Issuance of shares to employees, net of shares withheld for employee taxes        |              |    |                                |    | 4                                   |    |                  |       |       | 121  |      |    |        |     | (13    | )      |     | 108    |    |       |    |    |       |    |        |
| 20 | Stock-based compensation                                                          |              |    |                                |    |                                     |    |                  |       | 215   |      |      |    |        |     |        | 215    |     |        |    |       |    |    |       |    |        |
| 21 | Net income                                                                        |              |    |                                |    |                                     |    |                  |       |       |      |      |    | 4,240  |     |        | 4,240  |     |        |    |       |    |    |       |    |        |
| 22 | Other comprehensive income (loss)                                                 |              |    |                                |    |                                     |    |                  |       |       |      | (531 | )  |        |     |        | (531   | )   |        |    |       |    |    |       |    |        |
| 23 | Balance at May 31, 2017                                                           | 329          |    |                                | $  | -                                   |    |                  | 1,314 |       |      | $    | 3  |        |     | $      | 5,710  |     |        | $  | (213  | )  | $  | 6,907 | $  | 12,407 |
| 24 | Stock options exercised                                                           |              |    |                                |    | 24                                  |    |                  |       |       | 600  |      |    |        |     |        |        | 600 |        |    |       |    |    |       |    |        |
| 25 | Conversion to Class B Common Stock                                                | -            |    |                                | -  |                                     |    | -                |       |       | -    |      |    |        |     |        |        |     |        | -  |       |    |    |       |    |        |
| 26 | Repurchase of Class B Common Stock                                                |              |    |                                |    | (70                                 | )  |                  |       |       | (254 | )    |    |        |     | (4,013 | )      |     | (4,267 | )  |       |    |    |       |    |        |
| 27 | Dividends on common stock ($0.78 per share) and preferred stock ($0.10 per share) |              |    |                                |    |                                     |    |                  |       |       |      |      |    | (1,265 | )   |        | (1,265 | )   |        |    |       |    |    |       |    |        |
| 28 | Issuance of shares to employees, net of shares withheld for employee taxes        |              |    |                                |    | 4                                   |    |                  |       |       | 110  |      |    |        |     | (28    | )      |     | 82     |    |       |    |    |       |    |        |
| 29 | Stock-based compensation                                                          |              |    |                                |    |                                     |    |                  |       | 218   |      |      |    |        |     |        | 218    |     |        |    |       |    |    |       |    |        |
| 30 | Net income                                                                        |              |    |                                |    |                                     |    |                  |       |       |      |      |    | 1,933  |     |        | 1,933  |     |        |    |       |    |    |       |    |        |
| 31 | Other comprehensive income (loss)                                                 |              |    |                                |    |                                     |    |                  |       |       |      | 104  |    |        |     |        | 104    |     |        |    |       |    |    |       |    |        |
| 32 | Reclassifications to retained earnings in accordance with ASU 2018-02             |              |    |                                |    |                                     |    |                  |       |       |      | 17   |    |        | (17 | )      |        | -   |        |    |       |    |    |       |    |        |
| 33 | Balance at May 31, 2018                                                           | 329          |    |                                | $  | -                                   |    |                  | 1,272 |       |      | $    | 3  |        |     | $      | 6,384  |     |        | $  | (92   | )  | $  | 3,517 | $  | 9,812  |

The accompanying Notes to the Consolidated Financial Statements are an integral part of this statement.

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Question: How did Nike Inc.'s repurchase of Class B common stock in 2018 compare to 2017, and what does this indicate about Nike Inc.'s share buyback strategy?
Answer: Repurchase of Class B Common Stock 2018: $4,013 million
Repurchase of Class B Common Stock 2017: $3,060 million

Formula:
Percentage Change in Repurchase = ((Repurchase 2018 - Repurchase 2017) / Repurchase 2017) × 100

Calculation:
Percentage Change = ((4,013 - 3,060) / 3,060) × 100
Percentage Change = (953 / 3,060) × 100 ≈ 31.14%

Answer:
The repurchase of Class B common stock increased by approximately 31.14% from 2017 to 2018. This indicates that Nike significantly accelerated its share buyback strategy in 2018, reflecting a stronger commitment to returning value to shareholders. It may also signal confidence in the company’s financial performance and future prospects, or it could have been used to offset dilution from stock-based compensation.