$000 | | Note | | March 2017 | | | March 2016 | | | March 2015 | | ||||
Quantity of shares issued | | | | | | 49,357 | | | | 44,664 | | | | 55,782 | |
Fair value of shares awarded | | | | | | $1.9 million | | | | $2.2 million | | | | $2.0 million | |
Performance period | | | | | | 4 years and a 1 year post vesting retention requirement | | | | 4 years and a 1 year post vesting retention requirement | | | | 4 years and a 1 year post vesting retention requirement | |
Risk free interest rate | | | | | | 1.90 | % | | | 1.01 | % | | | 1.45 | % |
Volatility | | | 14.1 | | | 37 | % | | | 35 | % | | | 35 | % |
Euromoney Global Gold Index volatility | | | | | | 37 | % | | | 35 | % | | | 35 | % |
Correlation used between the Euromoney Global Gold Index and the company TSR | | | | | | 60 | % | | | 85 | % | | | 85 | % |
Weighted average share price on grant and valuation date | | | 14.2 | | $ | 87.41 | | | $ | 88.50 | | | $ | 67.41 | |