Question 1

What is open interest (OI) buildup?

Accepted Answer

OI buildup classifies a stock by combining its price direction with the change in futures open interest. Rising OI with a rising price is a long buildup; rising OI with a falling price is a short buildup; falling OI with a rising price is short covering; and falling OI with a falling price is long unwinding.

Question 2

What does long buildup mean?

Accepted Answer

Long buildup means both price and open interest are rising — fresh buyers are adding long positions, generally read as bullish conviction in that counter.

Question 3

What does short buildup mean?

Accepted Answer

Short buildup means price is falling while open interest rises — traders are adding fresh short positions, generally read as bearish.

Question 4

How often is this data updated?

Accepted Answer

Open interest data is sourced from NSE and refreshed through market hours, then served from our cache. OI is an end-of-the-tick snapshot, so treat intraday values as indicative.

F&O Open Interest Buildup