Anchor Investor

Anchor investors are qualified institutional buyers — typically mutual funds, insurers and large foreign funds — who are allotted part of an IPO's institutional quota one working day before the issue opens to the public.

Under SEBI's ICDR rules, up to 60% of the QIB portion of a mainboard IPO can be allotted to anchor investors, with part of it reserved for domestic mutual funds and similar institutions. Each anchor must apply for at least ₹10 crore, and anchors cannot pay less than the price at which the issue is finally allotted to the public.

Anchor shares are locked in: half for 30 days after allotment and the rest for 90 days. The company files the list of anchor investors and their allocations with the exchanges before bidding opens.

The list is read as an early signal of institutional interest — which funds participated and how widely the book is spread. The lock-in expiry dates are also watched, since anchors become free to sell then.

How stocks tend to react

A broad anchor book with well-known long-term funds is generally taken as a supportive signal for the issue. Around the 30-day and 90-day lock-in expiries, some newly listed stocks see selling pressure as anchor shares become tradable.

MarketPing measures this instead of guessing: every analysed announcement carries the stock's actual price reaction across 14 horizons, and the Reaction Lab aggregates how each category of announcement has historically moved stocks.

Related terms

Educational content, not investment advice. Regulations and tax rules change — verify current rules before acting.