What free market data covers and where it stops

Free market data is better than most people assume and worse than most people need. The public record in the United States is genuinely open: filings, disclosures and a large amount of trading information are published without charge, and a patient person can reconstruct most of what a paid service shows.

What free data does not give you is speed, shape or coverage. The information arrives late, arrives as documents rather than data, and arrives one source at a time. Whether that matters depends entirely on how often you make decisions and how quickly you need to make them.

So the honest answer to "is paid market data worth it" is that it depends on the gap between how you actually invest and what free sources can deliver. This page describes that gap plainly.

What free sources genuinely cover

The SEC's EDGAR system carries every registered company filing, and its full text search covers more than twenty years of those filings. Annual reports, quarterly reports, current reports, insider Form 4 filings and institutional Form 13F holdings are all there, free, in the same form a professional would read them.

Congressional trade disclosure is also free. Periodic transaction reports filed under the STOCK Act are published on the House Clerk's disclosure site and the Senate's public disclosure system, covering each purchase, sale or exchange of stocks, bonds, commodity futures or other securities above US$1,000.

FINRA publishes a surprising amount for nothing. Over the counter trading information is released on a delayed basis, giving weekly volume by alternative trading system, and short interest is reported by member firms twice a month. Exchanges also publish delayed quote and trade data through the sites most people already use.

That is a real body of information. If you buy a handful of positions a year and hold them for several, it may well be all you need.

Where the delays actually bite

Delay is not a vague complaint. It is specified, and the specifications are worth knowing.

Exchange market data policies filed with the SEC define a delay period, commonly fifteen minutes, after which data counts as delayed rather than real time. Anything free on a quote page is generally on that clock, which is fine for reading and unhelpful for acting.

FINRA's over the counter transparency data is slower again. Trading in NMS Tier 1 stocks is published on a two week delayed basis, and Tier 2 stocks and OTC equity securities on a four week delayed basis. That is useful for understanding where volume has been going over time. It is not something you can watch.

Short interest sits in the middle. Firms report twice a month against settlement dates set by FINRA, due by 6pm Eastern on the second business day after each, with publication following. The figure you are reading describes a position from a week or two ago.

The pattern is consistent. Free data is accurate and late. The further you sit from an actual decision, the less that costs you.

The gaps that have nothing to do with speed

The second problem is shape. Free sources publish documents, not datasets. A Form 4 is a filing. A periodic transaction report is often a scanned PDF. Weekly volume data arrives as a download. None of it is joined up, so connecting an insider purchase to unusual option activity to a price move falls to you, by hand, every time.

The third problem is coverage. Each free source covers its own slice. One covers filings, another covers congressional disclosure, another covers over the counter volume. Nothing covers all of it, and nothing covers crypto, forex and commodities alongside equities in a consistent structure.

The fourth is history. Free interfaces are built for looking up the latest item, not for asking how often something has happened before. A question like "how unusual is this level of option activity for this name" needs a normalised history, and assembling one is a project rather than an afternoon.

Finally there is monitoring. Free sources are places you go. They do not come to you, so anything you are not actively checking is something you find out about late.

What paid data actually adds

Paid services are not selling secret information. Almost everything in this category starts from the same public record. What they sell is the work: collecting it continuously, parsing filings into structured records, normalising them so they can be compared over time, joining separate sources against the same asset, and pushing changes to you rather than waiting for you to look.

The second thing they sell is reduced latency, which matters far less than most marketing implies for most people and a great deal for a few. The third is scope, since paying tends to buy breadth across asset classes and depth of history together, and that combination is the hardest to build yourself.

None of that changes the underlying facts. Paid or free, the SEC still requires Form 4 within two business days of the transaction, and congressional filers still have up to 45 days. Paying buys you a better view of the same record, not a different one.

How to decide, based on how you actually invest

Start with your real decision frequency, not your aspirational one. If you make a few decisions a year and hold for years, delayed free data is rarely the binding constraint. Your returns are not being decided in fifteen minute windows.

If you check positions weekly and want to know when something material has happened, the constraint is monitoring rather than latency. The question is whether you will reliably check five separate free sources every week. Most people will not.

If you make decisions several times a week, or you care about option positioning and volume behaviour as they develop, the shape and speed problems both bind. That is where paying starts to look like buying time back rather than buying an edge.

A reasonable test is to run free sources properly for a month and note every time you found something late or did not check at all. That list is what you would actually be paying to fix.

How InsiderPulse handles this

InsiderPulse sits on the paid side of that line, so it is worth being clear about what it does. It collects SEC Form 4 insider filings, congressional trade disclosures, options activity, dark pool and volume data, prices and news, then scores each asset it covers from 0 to 100 from those inputs, and how the score is built is documented rather than hidden. There is a Free plan, and paid plans run at US$9.99 a month for Investor, US$59.99 for Trader and US$199.99 for Professional, with the first month free on paid plans. It covers US listed stocks and ETFs plus crypto, forex and commodities, and not ASX shares, so it is not a complete answer for an Australian portfolio on its own. The products page lists what is included.

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