This is because the Oct 21st 45 short put is currently bid 3.00, ask 3.80 (mid 3.40). That's $340 in premium for a one contract 58 and change underlying ... .
Sept 16th 45 short put: bid .95, ask 1.11, mid 1.03.
Oct 21st 40 short put: bid 1.65, ask 2.10, mid 1.87.
I wouldn't be looking to acquire here, but rather to just squeeze some premium out and would look to take it off at 50% max profit. Broncos can make for an awfully rough ride ... . Ordinarily, I'd strangle this, but am hesitant to take on potential upside risk if this becomes a rocket sled sorta thang ... .