How to Do Stock Research

On February 25, 2026  By newsroom   Topic: Saving And Investing Money

Stock research, also known as "due diligence," is the process of analyzing a company's financials, leadership, and market position to decide if its stock deserves a place in your portfolio. Here’s how to do it effectively:


1. Familiarize Yourself with Research Tools

  • Use brokerage platforms or stock screeners to access data. Many brokers offer research tools, while free screeners like Yahoo Finance provide essential metrics.
  • Key features to look for:
  • Historical returns (10+ years ideal)
  • Ability to compare stocks against benchmarks like the S&P 500.
  • Screening for funds and their holdings.

2. Gather Key Research Materials

  • Review official financial filings via the SEC’s EDGAR database:
  • Form 10-K: Annual report with audited financials (balance sheet, income sources, revenues).
  • Form 10-Q: Quarterly updates on operations and results.

  • Look for summarized data on brokerage websites or financial news platforms to save time.


3. Analyze the Numbers (Quantitative Research)

Focus on critical metrics:
1. Revenue (Top Line): Total money earned. Look at "operating revenue" for core business performance.
2. Net Income (Bottom Line): Revenue after subtracting all expenses, taxes, and depreciation.
3. Earnings Per Share (EPS): Profitability on a per-share basis.
- Trailing EPS: Past 12 months' earnings.
- Forward EPS: Analyst-projected earnings.

  • Price-to-Earnings Ratio (P/E): Stock price divided by EPS.
  • Trailing P/E: Based on past earnings.
  • Forward P/E: Based on future projections.

  • Return on Equity (ROE): Profit generated per dollar invested by shareholders.

  • Return on Assets (ROA): Profit generated per dollar of assets.

Watch out for potential manipulation:
- ROE may be artificially boosted by stock buybacks.
- Increased debt can inflate ROA.


4. Dive into Qualitative Research

Go beyond numbers to understand the business:
- How does the company make money?
- Is the revenue stream straightforward or complex?
- Competitive Advantage (Moat):
- Look for strong brands, patents, innovation, or superior operations that competitors struggle to replicate.
- Leadership Quality:
- Check the experience and track record of the management team and board of directors.
- Favor boards with diverse and independent members.
- Potential Risks:
- Identify long-term threats (e.g., expiring patents, emerging competitors, or technological disruptions).


5. Put It All in Context

  • Compare Historical Data:
  • Evaluate performance during challenging periods.
  • Assess improvements and shareholder returns over time.
  • Benchmark Against Peers:
  • Use industry averages and competitors’ metrics for context.

Tips for Success

  • Build a holistic narrative about the company, combining quantitative metrics with qualitative insights.
  • Use free tools like EDGAR, Yahoo Finance, or brokerage platforms to gather information.
  • Focus on long-term potential instead of short-term stock price fluctuations.

Stock Research Takeaways

  • Combine quantitative (numbers) and qualitative (business insights) research for a well-rounded understanding.
  • Stock research doesn’t have to cost money; free tools provide sufficient data for informed decisions.
  • Always compare the company to itself over time and to industry peers.

With this methodical approach, you’ll gain confidence in identifying stocks worthy of your investment portfolio.


Next: Read 2500+ consumer guides to shopping, electronics, appliances, home services, cars, money and more.
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