What is GMP, the grey-market premium?
The unofficial premium at which an IPO’s shares change hands before listing. It is unregulated, self-reported by grey-market dealers, and no exchange records it. Treat it as a sentiment signal, never a guarantee. That is why we also show how often GMP has actually been right.
Right now, on this site
Across the 45 IPOs we followed from a last pre-listing quote to the real listing-day open, grey-market premium pointed the right way 80% of the time, and overstated the gain by a median of 1 pp. The record, issue by issue.
We hold a grey-market quote for 1 issue right now, each with the number of independent sources behind it. Today's GMP.
Live figures, rebuilt every pipeline run. Updated .
How accurate has GMP actually been? Our issue-by-issue record of grey-market premium against the real listing-day outcome — the one GMP question nobody else answers. See the GMP accuracy record →
See it on a real IPO. Every open and upcoming issue, with the numbers explained.
Browse live IPOs →