the ESPP on the grant date. The value of awards expected to vest is recognized as expense over the applicable service periods. We use the Black-Scholes option-pricing model to determine the fair value of stock options and employee stock purchase plan rights. The Black-Scholes option-pricing model incorporates various assumptions including expected volatility, expected term and interest rates. The expected volatility for common stock with a term of six months or longer and the historical stock price volatility over the estimated expected term of such awards, which Restricted stock units are valued based on the closing price of our common stock on the grant date. We use the straight-line attribution method We estimated the fair value of market-based RSUs on the grant date using a Monte Carlo simulation model. Under the award agreements, the metrics. The maximum potential awards that may be earned are 187.5% of the target number of the initial awards. For market-based RSUs granted in February and August 2023, the performance period during which the achievement goals will be measured is fiscal 2023, fiscal 2024 market-based RSUs granted in December 2023, the performance period during which the achievement goals will be measured is fiscal 2024, fiscal 2025 and fiscal 2026. The awards will vest in December 2026 if the TSR target, revenue growth metrics, and service conditions are achieved. For market-based RSUs granted in January and February 2025, the performance period during which the achievement goals will be period and recognize related stock-based compensation expense using the graded-vesting method. The amount of stock-based compensation