The pop is not the business

A friend pinged me before an IPO last week. "Grey market is showing 60, should I apply?"

Fair question. And the honest answer is that the grey market is usually right about the thing he was actually asking. It just was not the thing worth asking.

I pulled the 2025 mainboard listings to make the point. 65 of every 100 listed above their issue price. The median listing-day gain was 3.8%, down from 15.2% the year before, but still green. On day one it looked like a perfectly good year to be applying.

Then look at the same names in December. 59 of every 100 were trading below where they listed. The pop was real. It just had a short shelf life.

Here is the part that gets skipped. The grey market premium tracks the listing-day move tightly, somewhere around a 0.8 correlation in the studies I have seen. As a sentiment meter for the first hour of trading, it works. But its relationship with where the stock sits twelve months later is close to nothing. Same with oversubscription. Fifty times subscribed tells you the listing-day trade is crowded. It does not read the order book, the margins, or the promoter.

None of that makes the signal a liar. It makes it a signal for one specific horizon.

Applying for the pop and owning the business are two different trades. One is a sentiment bet that closes by lunch on listing day. The other is a five-year decision about cash flows. The expensive mistake is using the first one's number to make the second one's call, then being surprised in December.

Read the signal for the horizon you are actually trading: