Off-Exchange Trading Explained

What trade reports can and cannot show

5 min read

Not every share of a US-listed stock changes hands on a public exchange. Part of the volume is executed elsewhere and reported afterwards. This guide explains where trades print, how the trades executed away from the exchanges are reported, and what those reports can and cannot tell you.

Where Trades Print

A public exchange runs a displayed order book: bids and offers are visible before anyone trades against them, and the exchange matches them. That visibility is what makes exchanges the main place where prices are formed.

Trades can also execute at venues away from the exchanges. A broker may fill a client order internally, or an order may be matched at another regulated venue that does not display it beforehand. These trades are legal and regulated. What sets them apart is when the market learns about them: not before execution, as with a displayed order, but after.

The share of volume that executes away from the exchanges changes from stock to stock and from day to day. Whatever the split, every trade ends up in the same consolidated record of a stock's total volume.

How Off-Exchange Trades Are Reported

Trades executed away from the exchanges are reported after execution to facilities run under FINRA, the self-regulatory organization that oversees US brokerage firms. The reports feed the consolidated tape, which is why a stock's total daily volume includes them.

Each report carries the basic facts of the trade: the stock, the number of shares, the price and the time. FINRA also publishes aggregated statistics on trading away from the exchanges. Reporting rules and timing differ by type of trade and venue; FINRA's own documentation is the place to check them.

What the Reports Can and Cannot Tell You

A trade report is descriptive. It tells you that a trade of a given size happened at a given price and time, away from the exchanges.

It does not tell you who traded. It does not tell you which side started the trade, or whether the trade was part of a hedge, a rebalance, or a broker facilitating a client order. A large report shows that a large trade occurred, nothing more about intent.

Nor is it a forecast. A report, or a run of reports, describes what already happened. Reading it next to other public information, such as the stock's own volume history or a scheduled event, can help describe the context around a trade. It does not say where the price goes next.

What TradeAI News Measures Instead

TradeAI News does not ingest off-exchange trade reports. Its Unusual Volume module measures each ticker's total volume, from public market data, against that ticker's own baseline. It shows how unusual the day's activity is for that name, not where the volume executed or who was behind it.

That reading sits on the same page as the ticker's Estimated Gamma Exposure, short interest & FTD, insider activity and market events. We measure significance and magnitude, never direction.

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