Series code
Trading & ordersAlso called: Scrip series, BSE group
The tag an exchange attaches to a listed security — a series on the NSE, a group on the BSE — that determines its settlement treatment, most importantly whether intraday trades may be netted off.
In plain terms
It belongs to the security, not the company, and it moves. The ordinary one lets you square off the same day; the trade-to-trade one does not, and the chart looks identical either way.