I'm interested in making some option plays but I'm confused about Bid vs. Asks and the actual price of an option. I've been told that usually the difference is split between the bid and the ask and this is what you'll typically get.
So for example:
The June 18th $18 dollar put was last at $0.79. The Bid is $0.67 and the Ask is $0.80. Adding the two together and dividing by two = $0.735 (call it $0.74). Clearly the last trade was higher than the bid. Why?
As you can see, the June 18th $3.00 put has a Bid of $0 but an ask of $0.15. If I wanted to write a $3 Put, would I get $0.15/share?