​

​

​

Year Ended December 31, 

​

​

​

2021

​

Risk‑free interest rate

​

​

​

0.4% – 0.6

%

Expected volatility

​

​

​

55.0

%

Expected life (in years)

​

​

​

4.8

​

Expected dividend yield

​

​

​

—

​

Fair value of Common Stock

​

​

$

19.82 – 30.49

​

Exercise price

​

​

$

11.50

​