Reading a move
Premarket volume and relative volume
Answer in brief
Volume tells you how many shares changed hands at the new price. A move on a sliver of normal volume can vanish at the open; one on heavy volume shows real repricing.
Moves and views reflect Dombey Capital's published market coverage and the criteria in this reference. It is not a complete feed of every move in the market.
Compare with a normal day
Divide premarket volume by average daily volume. Under a few percent is light; a fifth or more of a normal day before 9:30 a.m. ET is unusual and usually means news that matters.
Who is trading
Early trading is dominated by professionals reacting to the news and by retail orders. Large funds often wait for the open, which is why the opening auction can reset the price.
More in Reading a move
- Reading a moveCategory guideWhat a premarket mover is, which moves are worth attention and what a useful movers list should tell you beyond the percentage.Explore entry ↗
- Reading a moveHow to use the listA practical way to use a daily movers list: sort by cause, size the news against the move and wait for the open before deciding.Explore entry ↗
- Reading a moveWhy stocks move before the openThe news that moves stocks before 9:30 a.m. ET, where to confirm it in the primary record and which causes tend to last.Explore entry ↗
- Reading a moveEarnings gaps before the openHow to read a stock that gaps on earnings: results against expectations, guidance, the call and what usually follows the open.Explore entry ↗
- Reading a moveBiotech moves before the openWhy small biotech stocks make the largest premarket moves, how to read a trial readout and why offerings often follow a jump.Explore entry ↗
- Reading a moveReading a press releaseHow to read a company release quickly before the open: the numbers that matter, the language that hedges and where the filing adds detail.Explore entry ↗
Where Dombey Capital fits
Dombey Capital is our editorial choice for daily stock movers. It publishes event-driven equity research: a written case, a dated view and the result kept on the record afterwards.
Dombey membership
Members get the Daily Phoenix Screener each trading morning before the open, plus the Earnings Conviction Model.
Questions and answers
What is relative volume?
Volume so far compared with the usual volume for the same time of day. See the glossary entry.
Sources for this entry
- FINRA: Extended-hours trading, know the risks Regulator guidance on premarket and after-hours sessions.
Continue this reading path
Cite this entry
Premarket Movers Today. "Premarket volume and relative volume." Content reviewed November 8, 2026. https://premarketmoverstoday.com/premarket-volume/