Free cash flow yield is a financial solvency ratio that compares the free cash flow per share a company is expected to earn against its market value per share. The ratio is calculated by taking the free cash flow per share divided by the current share price. Free cash flow yield is similar in nature to the earnings yield metric, which is usually meant to measure GAAP (generally accepted accounting principles) earnings per share divided by share price.
FCF roce is the modified roce that uses free cash flow instead of ebit