1. The total number of options and/or futures contracts 
that are not closed or delivered on a particular day.

2. The number of buy market orders before the stock market 
opens.

1. A common misconception is that open interest is the same 
thing as volume of options and futures trades. This is not 
correct as demonstrated in the following example:



On Jan 1, A buys an option, which leaves an open interest 
and also creates trading volume of 1.
On Jan 2, C and D create trading volume of 5 and there are 
also 5 more options left open.
On Jan 3, A takes an offsetting position and therefore open 
interest is reduced by 1, and trading volume is 1.
On Jan 4, E simply replaces C and therefore open interest 
does not change, trading volume increases by 5.

question:- Defination of Book keeping:-
answer :- Book keeping is a syntific method to record day 
to day business transaction in words & in figures so as to 
show the correctly & clear financial position of business.

open interest is not same as volume.. with volume both 
entries and exist cause volume to increase... but with open 
interest, entries cause open interest to increase and exist 
cause open interest to decrease

total number of derivative contracts, like futures and options, that are currently active on a specific underlying security.These contracts have not been yet exercised,expired or fully delivered.

12.5% IS not Conclude Doc.Charge