Pre-Listing: Allotment to Listing Day
After the IPO closes, the timeline leading to listing day looks like this:
- T+1 to T+3: Basis of allotment finalized by registrar
- T+4: Allotment credited to demat accounts
- T+5: Refunds processed (for unsuccessful applicants)
- T+6 (Listing Day): Stock begins trading on BSE/NSE
T = IPO close date. SEBI has mandated T+6 listing (down from T+10 previously) to reduce investor wait time.
Morning of Listing Day: 9:00 AM – 9:30 AM
This is the pre-open session. Orders are collected without execution. Buyers and sellers place bids/asks. The exchange uses these orders to compute the likely listing price through a price discovery algorithm.
9:30 AM: Trading Begins
Normal trading opens. The stock lists at whatever price the pre-open session discovered. This is the official listing price.
- Listing above issue price: Premium listing — investors with allotment see profits immediately
- Listing below issue price: Discount listing — investors in loss if they applied at issue price
The First Hour: Volatility Zone
The first 30–60 minutes of trading are often the most volatile. Large block orders from institutional investors, profit-booking by allottees, and market sentiment all play out simultaneously. Prices can swing significantly.
Upper Circuit / Lower Circuit
If the stock moves too fast (typically 20% above or below the previous close), it hits a circuit breaker:
- Upper circuit: Trading halts on the buy side — only sellers. Many SME IPOs hit upper circuit on listing.
- Lower circuit: Trading halts on the sell side — often a panic signal.
What to Watch on Listing Day
- Pre-open price vs GMP — did the market confirm the grey market's prediction?
- Volume — high volume with rising price = genuine demand
- Depth — order book depth shows how much buying/selling pressure exists
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