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Share-based payment (Tables) | 12 Months Ended
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Dec. 31, 2020
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Number and Weighted Average Exercise Prices ("WAEP") of, and Movements in Share Options | The following table illustrates the number and weighted average exercise prices (“WAEP”) of, and movements in share options during the year:
|  | Number of share options |  |  | WAEP |  |  | Number of share options |  |  | WAEP |
|  | 31.12.2019 |  |  | 31.12.201 9 |  |  | 31.12.2020 |  |  | 31.12.20 20 |
Outstanding at January 1 and December 31 |  |  | 470,000 |  |  | US$ | 21.11 |  |  |  | 470,000 |  |  | US$ | 21.11 |
Exercisable at December 31 |  |  | 470,000 |  |  | US$ | 21.11 |  |  |  | 470,000 |  |  | US$ | 21.11 |
Fair Value of Share Options and Assumptions |
Date of grant of options |  | On July 29, 2014
Fair value at measurement date (US$) |  | 5.70 – 6.74
Share price (US$) |  | 21.11
Exercise price (US$) |  | 21.11
Expected volatility (%) |  | 47.4
Expected option life (years) |  | 3.5 – 5.5
Expected dividends (%) |  | 5.81
Risk-free interest rate (%) |  | 1.4 – 2.0

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- Definition The disclosure of the number and weighted average exercise prices of share options. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2020-01-01 -Paragraph 45 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_45_b&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The disclosure of the general terms and conditions of share-based payment arrangements. [Refer: Share-based payment arrangements [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2020-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_45&doctype=Standard -URIDate 2020-01-01 + Details
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