Periodic Call Auction stocks

Wed, 20 May 2026 00:00:00 +0000

Periodic Call Auction (PCA) is a discrete-interval order-matching mechanism used by NSE / BSE for thinly traded or heavily surveilled stocks. Instead of continuous matching during market hours, PCA matches orders at scheduled intervals (typically every 30 minutes or hour), allowing price discovery in a controlled environment.

How PCA works

In a normal session:

Continuous matching of buy and sell orders throughout 09:15 to 15:30.
Real-time price discovery.

In PCA:

PCA on WebNotes

Periodic Call Auction stocks

How PCA works