Trade 1 (10:20:01 am, PT) ← SPX trading around 2913
sell -4 August 29, 2018 2910 puts at $1.00 ← delta 27.30
buy +4 August 29, 2018 2895 puts at $0.05 (cheap wings)
Trade 2 (12:45:13 pm, PT)
buy back short puts (2910) at $0.05 (to remove the risk)
let long puts (2895) expire worthless
PROFIT: $380 (in 2.5 hours)
