@Mr. Agrawal Sir, I had sold 700 shares in grey and sold remaining 700 at pre-open.
Sir, ye sab chalta rehta hai stock market me. (aap ne bhi experience kiya hi hoga)
Sometimes there are listings above expectations sometimes below, definitely not in our control.
What is in our control is to increase the accounts and increase the allocation chances in good IPO's.
Also, it is important to follow a set strategy.
Either you sell everything in pre-open/sell everything in grey/sell in-parts after listing.
Whatever strategy you follow keep it consistent and ensure that you follow the same for each IPO.
Good Luck !!!