Guides

Plain explainers.

General market news. Not investment advice.

Start here if the premarket is new. One topic per guide. The daily notes are separate.

How the US premarket works

The hours before the 9:30 ET open, and what a print there is not.

Gap types before the open

The space between the prior close and the premarket print.

Float and short interest

Two share counts, and the page each one has to come from.

What a trading halt does

Prints stop. The notice names the reason. Rumors do not.

Dilution and offerings

New shares, the prospectus, and the three lines that matter.

How to read an 8-K

The item number is the map. The exhibit is the document.

Premarket volume

Shares that changed hands before the open, and what a big number is not.

The risk before the open

Halts, dilution, thin prints, and a record that keeps the misses.