The Question and Answer Board

[Coz Mabluda]

Trying to get a handle on bid/ask prices. Who sets them, the computer, or Nasdaq (Nasdaq stocks) or the market makers.. who ?
I understand if you want to buy, you use the ask price. If you want to sell, you use the bid price. Say a sale goes thru at $10.00
or the ask price, do they then raise the ask to $10.05 in hopes somebody will play this newer higher price? In a nutshell, what are
the mechanics for prices to keep changing ? How does it work ???