Usually the min is a credit 1/3 the max loss. In this case, both theta and vega have a huge influence on the value of the spread. Spread is worth -$7. When I bought it I received a credit. Theta is $1.40 a day (in my favor) and vega is $7.20 per increase in one point of implied volatility, whose percentile is 3% now. Unless a latge upward move (rare with IVP <5%) this will do Well. We will see. 2/6/17