Who’s buying and selling the options?
It is debated amongst different markets that the options markets are more efficient than the stock markets. The CBOE has a couple of markets makers in each optionable stock. Their sole function is to buy and sell options out of their own accounts to set the bid and ask prices for options in that category. They cannot make the market by taking public orders, and thus if you place a market order it is never a market maker that takes the other side of that transaction. There is another fundermentalist in Options, being the ‘board broker’. The CBOE board broker does not actually trade as such, but rather just collects all the buy and sell orders and tallies them up and matches the orders amongst traders.
Option market opening and closing and settlement
Options markets open at 9:00 each morning Monday to Friday. They open in rotation from market to market immediatly following the opening of the underlying security or stock. This rotational opening system can pose an issue for options prices when an underlying security experiences extreme volatility during the open. It can result is some very unfavourable prices for your options contracts if the underlying stock moves too fast during this opening rotation. For this very reason it is unadvisable to trade during the opening rotation at all… and if you do decide to trade. i.e by putting an order together the night before opening, then make sure that the type of order you place is a limit order, thus dictating to the market the exact price that you are filling to pay for that particular contract. Generally speaking, market orders are fine if you would like to get filled fast during the course of the day, but NEVER the night before the market opens due to this rotational opening system.
The markets close at 4:00 Monday to Friday. During the last 5 minutes of trading, the options market generally has a huge spike of activitiy. and for this reason, it is usually best to steer clear of trading during this time, especially if you are trying to exit a position that is in-the-money and going to be exercised. Sometimes, even market orders fail to get filled during this time, so just avoid it if at all possible, and if you do put an order together make the order expire if unfulfilled at the end of the day… Good till cancelled orders may be a source of trouble for you if you forget to cancel your unfillilled order at the end of the day.
All options contracts are settled the fiollowing day. Some brokers require you to fulfill your contracts the same day, however, the CBOE doesn’t settle till the following day. that is the day that you need to be able to have funds to cover any filled position or assignment. And all options that expire on a given month cease trading on the 3rd Friday of that month and are settled on the following Saturday.






