Hi Mark,
If I were to purchase a high number of an out of the money call, would it drive the price of the option up?  Say for example I were to be bullish on the short term outlook of an underlying stock worth 8/share.  The 10 July call  is 0.10 and the average daily volume is 20 contracts.  If I purchased 1000 contracts, would that drive up the price of the option and what are the chances an order like that would
be filled?

Hello,

You cannot know, in advance, how many of these July 10 calls the market makers would be willing to sell at 10 cents apiece.  Obviously you could buy the number of contracts that are offered at that price and there is a small chance you could buy even more at that price - perhaps double the quantity.  But, in today's world market makers are unwilling to take unlimited risk without being compensated to take that risk.  That means it's unlikely you could buy 1,000 contracts at any reasonable price.  Thus, in my opinion the chances of being able to buy 1,000 contracts at 10 cents (or even 15 cents) are exceedingly small.

Mark