FUTURES STYLES This bets usually expire on a quarterly basis i.e. March, June, September
and December. Generally, the pricing of the spread bet is based on the
underlying futures prices, which will rarely be the same as the spot price
because of the cost of carry.
DAILY This are straightforward. They are usually based on cash market and usually
expire at the end of the day.
ROLLING DAILY
This is also quite straightforward as well. It rolls over to the next business
day instead of closing out at the end of the day.