Market Insights by Trading Session
Market Insights shows the average dollar value traded per day in each trading session - premarket, the opening auction, regular hours and its first hour, midday, last hour and last 2 minutes, the closing auction and after hours - over the last 30 trading days against the 30 before. For each session it adds a week-by-week history and breakdowns by security type, trader size, the 10 most active symbols and the sector ETFs. It is listed for Premium users and is currently open to everyone as a limited-time free preview.
What is Market Insights by Trading Session?
US stocks trade in several sessions: premarket, the opening auction, regular hours, the closing auction and after hours. Market Insights shows how much money changes hands in each one - the average dollar value traded per day over the last 30 trading days against the 30 days before - so you can see where trading is growing or shrinking. Pick a session to break its trading down by type of security, trader size, the most active symbols and the sector ETFs, with its week-by-week history.
How the figures are worked out
- Dollar value, not shares. Each figure is the notional value traded - price times shares - on the exchanges and away from them, added up across the stocks and ETFs we track.
- Two 30-day windows. Current 30-Day Avg is the total for the last 30 trading days divided by 30; Previous 30-Day Avg does the same for the 30 trading days before. Change compares the two.
- The sessions. Premarket, Open Cross (the opening auction), Regular Hours, Close Cross (the closing auction) and After Hours, plus four parts of regular hours: the First Hour, Midday, the Last Hour and the Last 2 Minutes. Under each part's dollar figure is its share of the Regular Hours total.
- Up to the previous trading day. The report runs through the trading day before today, so today's trading is not included and the figures change once a day.
- Trader size. For a session, trading is split into the four trader-size groups we classify trades into - Small, Retail, Professional and Institutional - with the share of each group's dollar value traded away from the exchanges, such as in dark pools.
- Symbols and sectors. The 10 symbols with the most dollar value in the session over the last 30 trading days (among those with at least 1 million shares traded in that time), and SPY with the 11 sector SPDR ETFs, each with its share of the session's total. A last table adds up the session's trading in each sector ETF's holdings.
The report measures how much is trading and when, not which way prices move.
What you can find out
How much trading happens before the open and after the close?
The summary table puts the average daily dollar value of Premarket and After Hours next to Regular Hours and the two auctions, with the change from the previous 30 trading days. See trading by session
Is more trading moving to the close?
Compare the Close Cross, Last Hour and Last 2 Minutes rows over the two windows; the parts of regular hours also show their share of the Regular Hours total. For the auctions day by day, see the Opening and Closing Auction reports. How the auction reports work
How has a session's trading changed week by week?
Click View on a session's row. A chart and a table show each completed week's average daily dollar value over about the past year, with the change from the week before in dollars and percent. See the weekly history
Are large or small traders more active, and how much trades in dark pools?
Notional Volume by Trader Size shows each group's average daily dollar value in the session, the change against the previous 30 days, and the share of it traded away from the exchanges. See trading by trader size
Which stocks and sectors draw the most money in a session?
The 10 Most Active Symbols table ranks symbols by dollar value in the session, with each one's share of the session's total. The Sector ETF tables do the same for SPY and the sector ETFs, and for the stocks they hold. See the most active symbols
Where to find it
Menu: Stocks › For Premium Users › Reports › Market Insights, or go straight to /Reports/MarketInsightsByTradingSession. The page opens on the summary table with the Premarket session's details below it; click View on another row to switch sessions.
Market Insights is listed for Premium users. It is currently open to everyone as a limited-time free preview: every visitor sees the full report, and visitors without a Premium plan see a notice inviting them to log in or subscribe.
What each table shows
| Table | What it shows |
|---|---|
| Summary Trading Value by Session | Each session's current and previous 30-day average daily dollar value and the change; the parts of regular hours also show their share of Regular Hours |
| Week by Week Notional Value Traded | Each completed week's average daily dollar value for the session, and the change from the week before |
| Notional Volume by Stock Type | The session's dollar value split by type of security, such as common stock, ETF, preferred, closed-end fund or REIT |
| Notional Volume by Trader Size | Dollar value for Small, Retail, Professional and Institutional trading, and % Dark Pool: the share traded away from the exchanges |
| Notional Volume of the 10 Most Active Symbols | The symbols with the most dollar value in the session; % of Market Total is each one's share of the session's total |
| Sector ETF Notional Volume | SPY and the 11 sector SPDR ETFs; % of Combined Sector ETFs is each fund's share of the 11 sector funds together, SPY left out |
| Notional Volume for Sector ETF Holdings | The session's trading in each sector ETF's holdings, added together per fund |
FAQ
- What is notional value?
- The dollar value of the shares traded: price times shares, added up over the trades. It puts a $10 stock and a $500 stock on the same scale.
- Does the report include today's trading?
- No. It runs through the previous trading day, so the figures change once a day.
- What are the Open Cross and Close Cross?
- The opening and closing auctions, where orders are matched at one price to set the day's opening and closing prices. The Opening and Closing Auctions guide covers them day by day.
- What does % Dark Pool mean?
- The share of a trader-size group's dollar value that traded away from the public exchanges, such as in dark pools, in each 30-day window.
- Who can use Market Insights?
- It is listed for Premium users and is currently open to everyone as a limited-time free preview, so every visitor sees the full report.
- Does more money trading in a session mean prices will rise?
- No. The report measures how much is trading and when, not which way prices move.
Related
Opening and Closing Auctions Premarket Trading Report After Hours Trading Report Big Money Stock FlowTerms on this page
Notional value Dark pool Closing auction Sector ETFMarket Chameleon provides data, not investment advice.