Stock research tools: what each kind is good for

There is no single best stock research tool. Each kind is good at one job and weak at another, and most investors combine a few. Here is what each kind of tool is for, and what to watch out for.

1. Primary sources: SEC EDGAR and investor-relations pages

SEC EDGAR is free and holds every 10-K, 10-Q, 8-K and Form 4 a US-listed company files. It is the source the other tools quote. The downside is time: the filings are long, and EDGAR does not summarize or compare anything for you.

2. Free quote and screener sites

Free finance sites are good for a quick look at price, market value, basic ratios and headlines, and screeners help you narrow a list by size or sector. They show numbers, not reasons. Coverage of small companies is often thin, and you still have to find out where a figure came from.

3. Broker research and analyst ratings

Many brokers give customers access to analyst reports and consensus ratings. They are useful for understanding what the market expects. Read them as one opinion, check the date, and remember that ratings cluster around "buy" and "hold".

4. Charting platforms

Charting tools are built for price history, indicators and drawing trend lines. They are the right tool for timing questions and the wrong tool for questions about the business. Kervence includes the basics of that view, a trend channel with support and resistance on every stock, so you can see the price trend without leaving the company research.

5. AI research assistants

AI tools can read filings and news and answer questions in plain language. The quality depends on whether they show their sources. A good one lets you click through to the filing behind each claim; a weak one gives fluent answers you cannot check. Our guide on how to use AI for stock analysis covers what to ask.

How to choose

• Can you see the source? Every number should lead back to a filing, report or article.
• Does it cover the stocks you own? Small caps are where coverage usually runs out.
• Does it show both sides? A tool that only finds reasons to buy is doing marketing.
• Does it save you time on the boring part? A tool should take the reading off your hands. The deciding stays with you.

Where Kervence fits

Kervence is an AI research assistant for every company on Nasdaq and NYSE. It answers with the sources attached, writes a daily brief on your portfolio, and keeps company reports with a bull case, a bear case and valuation scenarios. It also draws the technical picture for every stock, and on Pro adds insider trades, peers and macro. Use it alongside EDGAR, not instead of it.