Share options granted by the Company and USISH in 2015 were measured using the Hull & White Model (2004) incorporated with Ritchken’s Trinomial Tree Model (1995) and the Black-Scholes Option Pricing Model, respectively, and the inputs to the models were as follows:
| ASE Inc. | USISH | |||
| Share price at the grant date | NT$36.5 | CNY15.2 | ||
| Exercise prices | NT$36.5 | CNY15.5 | ||
| Expected volatility | 27.02% | 40.33%-45.00% | ||
| Expected lives | 10 years | 10 years | ||
| Expected dividend yield | 4.00% | 0.87% | ||
| Risk free interest rates | 1.34% | 3.06%-3.13% |