Sold a SOFI December Bull Put spread for $.42 ($42).

SOFI Sell $10.00 $0.55 $11.19 SOFI
SOFI Buy $8.00 -$0.13
$0.42 Credit
$2.00 $0.21 Buy back 50.00%
Want min. credit to be at least 10% times the strike difference $0.20
Max reward $0.42
Max risk $2.00
Return 26.58%
Credit divided by the risk (credit to risk ratio)
21.00%