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June 14, 2026
The Dispatch

Definition

Oversubscription

Oversubscription is when an IPO receives bids for more shares than are on offer, expressed as a multiple such as '10x'.

If an IPO is subscribed 10 times, investors have bid for ten times the shares available. Heavy oversubscription, especially in the QIB and NII categories, signals strong demand and often (though not always) precedes a listing gain. Allotment is then scaled down using the basis of allotment.

Subscription figures are published live on the NSE and BSE websites during the issue. Retail and HNI investors watch these numbers closely, as a very high subscription in the institutional book is treated as a quality signal.

Related terms

  • Basis of AllotmentThe basis of allotment is the formula, approved by the exchange, that decides how shares are distributed among applicants when an IPO is oversubscribed.
  • UndersubscriptionUndersubscription is when an IPO fails to attract bids for all the shares on offer.
  • Listing GainListing gain is the profit an investor makes when an IPO share lists on the exchange above its issue price.

Plain-English explainer from The Dispatch Investors Encyclopedia. General information, not financial advice.