How the Business Makes Money
Identify who pays the company and why they choose its products over competitors. Look at whether revenue arrives from recurring subscriptions, one-off purchases, or long-term contracts subject to renegotiation.
Does the business retain customers without offering persistent discounts? Check whether buyers stay because the product remains essential or whether sales drop whenever promotional pricing ends.
Read the Regulatory Filings
Review official regulatory reports rather than relying on promotional summaries. An annual Form 10-K details operations in Item 1, explicit risks in Item 1A, management perspective in Item 7 MD&A, and audited financials in Item 8, while quarterly Form 10-Q reports provide abbreviated updates.
Remember that the SEC does not vouch for the accuracy of a 10-K or 10-Q. This disclaimer means you should review disclosures critically, scanning footnotes for accounting shifts or debt obligations.
Source references: U.S. Securities and Exchange Commission / Investor.gov — How to Read a 10-K/10-Q
Compare Valuations in Context
The price-to-earnings ratio divides share price by earnings per share. As FINRA notes, there can be significant variation in the average ratio across industries, so comparisons require relevant sector peers.
Consider an illustrative hypothetical scenario: Stock A trades at $40 with $2 in earnings per share, giving a P/E ratio of 20. Stock B trades at $100 with $10 in earnings per share, giving a P/E ratio of 10.
Stock B looks cheaper on paper, but a lower multiple does not prove it is a better investment. Ask what business differences explain that gap, and verify whether the two companies are truly comparable.
Source references: FINRA — Evaluating Stocks
Check for Portfolio Overlap
Asset allocation decisions depend on your personal time horizon and risk tolerance. Aiming for diversification means spreading capital across and within asset classes rather than duplicating identical risks.
Narrowly focused ETFs may not diversify your holdings if their underlying assets mirror your individual stocks. Regulators note that you should check the top holdings of the funds you own to identify potential concentration.
Source references: Investor.gov — Asset Allocation and Diversification
Set Disconfirming Conditions
Before buying shares, record your thesis in a written log alongside two serious counterarguments. Document the operating metrics, cash balances, or product milestones required to keep your investment idea intact.
Establish an explicit disconfirming condition that triggers an immediate reassessment. If customer growth stalls or profit margins contract over consecutive quarters, use that evidence to re-evaluate the thesis rather than rationalizing the decline.
Limitations to keep in view
This checklist organizes questions; completing it does not establish that a stock is suitable for you or protect your investment from losses.
The hypothetical P/E comparison holds no forecast for either business. Treat the result as a starting question, not a buy or sell signal.
Sources & corrections
Prepared with AI assistance and automated source and calculation checks. No independent human analyst review is claimed. Hypothetical examples and historical data are identified in the text.
Use the linked primary sources to check definitions and company disclosures. Filings and service details can change; verify the relevant period before relying on a figure.
- U.S. Securities and Exchange Commission / Investor.gov — How to Read a 10-K/10-Q
- FINRA — Evaluating Stocks
- Investor.gov — Asset Allocation and Diversification
Found an error? Send a correction with the page, the claim and a supporting source. These guides provide general education; they do not assess your financial circumstances or recommend a trade. Read our research disclosures.