Price records what has already been decided

Price is a lagging indicator because a price is a record of a completed transaction. Every print on the tape is the point at which a buyer and a seller had already decided, already sent orders, and already matched. The number arrives after the behaviour that produced it, not before.

That is not a criticism of price. It is the most compressed piece of information in markets, aggregating the views of everyone willing to act. The problem is narrower: if price is the only thing you look at, you are reading the output of a process while ignoring the process. Every indicator built purely from price, including moving averages, momentum measures and trend scores, inherits that limitation, because you cannot remove lag from a series by doing more arithmetic on it.

What sits upstream are the records of activity. Company insiders have to file when they trade, members of the US Congress have to disclose theirs, options trades print as they happen, and volume shows how much agreement a move required. None of it predicts anything, but it describes behaviour at an earlier point in the chain than the closing price does.

What lagging actually means here

A lot of confusion comes from treating lagging as an insult. It simply means the value at any moment is a function of information from earlier moments. A 50 day average of closing prices is lagging by construction, and so is a momentum score, since every input is drawn from sessions that have finished.

The useful question is not whether something lags, because everything observable does. It is how far back in the chain you can get, and what you give up in exchange. Data closer to the decision tends to be sparse, ambiguous and hard to interpret. Price is late, but continuous, unambiguous and available for every asset.

What sits upstream of the tape

Insider filings are the clearest example. Under the US securities laws, officers, directors and large shareholders must report their transactions in company stock to the SEC on Form 4, and the SEC requires that filing within two business days of the transaction. The filing tells you who traded, how many shares, at what price and when. Since the SEC's 2022 amendments to Rule 10b5-1, Form 4 also carries a checkbox showing whether a transaction was intended to satisfy that rule's affirmative defence conditions, which separates a trade scheduled in advance from a discretionary one. The page on what insider buying actually means goes through how to read these.

Congressional disclosures work on a slower clock. Under the STOCK Act, covered transactions above US$1,000 must be disclosed no later than 30 days after the member is notified of the trade, and in no case later than 45 days after the transaction itself, according to the Senate Select Committee on Ethics guidance. That is much later than a Form 4, though still a record of a specific decision by a specific person, which a price chart never gives you. There is more on the mechanics in the guide to tracking politician stock trades.

Options activity is the fastest of the upstream data sets, because options trades print to the tape as they occur. A large block in one strike and expiry is a decision about a particular price and a particular date, made before the outcome is known. Reading it is genuinely difficult, which is covered in the piece on unusual options activity.

Volume is the plainest of the four: it tells you how much trading was required to produce a move, which measures how much agreement was behind it. Some of it executes away from the lit exchanges and is reported to a FINRA trade reporting facility instead. FINRA publishes that off exchange volume weekly, on a two week delay for Tier 1 NMS stocks and a four week delay for Tier 2 NMS stocks and OTC equity securities.

Where the argument runs out

This is the part most versions of this thesis leave out.

Upstream data is itself delayed, sometimes badly. The FINRA off exchange figures above are weeks old when published. FINRA collects short interest twice a month, on positions held at the middle and the end of each month, and publishes it on the seventh business day after the reporting settlement date. Institutional holdings on Form 13F, filed by managers with at least US$100 million in covered securities, are not due until 45 days after the end of a calendar quarter, so a position taken early in that quarter is already months old when you see it. "Upstream" is relative, not instant.

The data is also ambiguous. An insider sale can reflect tax, diversification, a house purchase or a schedule set months earlier, and reading intent into it is usually a mistake. A large options print can be a hedge, one leg of a spread, a roll, or a trade being closed rather than opened, and the print alone rarely tells you which. Off exchange volume tells you where a trade was executed, not who traded or why.

Signals are also sparse and unevenly spread. Plenty of assets go months without a meaningful filing. Crypto, forex and commodities have no equivalent to Form 4 at all. The absence of a signal is not evidence of anything.

Every one of these sources is public. A Form 4 is available to everyone the moment it hits EDGAR, so there is no private information here, only the question of whether you are reading it. None of it establishes cause and effect either: activity data describes what people did, not what happens next.

Using upstream data without overreaching

The practical framing is that price answers what happened, and activity data helps with who was involved and when they acted. Neither answers what happens next, and any tool implying otherwise is overselling.

What works is treating upstream data as a way of generating better questions. A price move with nothing behind it in the filings is a different situation to one preceded by a cluster of disclosed buying, not because the second is a signal to act, but because it gives you something specific to go and read. The point is to shorten the list of assets you investigate, not to replace the investigating.

How InsiderPulse handles this

InsiderPulse was built around this idea. It combines SEC Form 4 filings, US congressional trade disclosures, options activity, dark pool and volume data, prices and news into a single 0 to 100 score for every asset it covers, so price is one input rather than the whole picture. Ask Pulsey answers questions with citations back to the source data, which matters when a signal turns out to be a scheduled sale or a routine hedge. Details of the weighting are in how the score works. It is a data tool for research, and it does not forecast prices or pick assets.

InsiderPulse is a data tool. Nothing on this page is financial advice.