Stock Market Analysis Guide
Complete guide to stock market analysis: how stocks work, how to research and select stocks, read market trends, and use Diplyzer's AI agent to analyze any stock in seconds.
The stock market is the world's largest arena for building wealth — and its most misunderstood. Every day, trillions of dollars change hands between buyers and sellers, each acting on their own interpretation of value, risk, and future potential. Understanding how the market actually works — and how to analyze individual stocks within it — is the foundation of every successful investor and trader.
Diplyzer makes that analysis instant, comprehensive, and conversational.
How the Stock Market Works
When a company wants to raise capital from the public, it issues shares of stock through an Initial Public Offering (IPO). Each share represents a fractional ownership stake in the company. From that point forward, those shares trade between buyers and sellers on public exchanges — the NYSE, NASDAQ, London Stock Exchange, and over 60 other global markets.
The price at any moment reflects the collective judgment of all market participants about the company's current and future value. When the market believes a company will grow profitably, demand for its shares rises and the price increases. When confidence falls — due to disappointing earnings, management problems, sector headwinds, or macroeconomic deterioration — sellers outpace buyers and the price falls.
The stock market is, in essence, a continuous voting machine (short-term) and a weighing machine (long-term). In the short run, price reflects sentiment and narrative. In the long run, price follows fundamentals: revenue, earnings, cash flow, and return on capital.
The Major US Stock Exchanges
NYSE (New York Stock Exchange): The world's largest exchange by market capitalization. Home to blue-chip companies including JPMorgan Chase, Berkshire Hathaway, Coca-Cola, Johnson & Johnson, and most financial and consumer staple giants.
NASDAQ: Technology-focused exchange. Home to Apple, Microsoft, Amazon, Alphabet, Tesla, Meta, and most growth technology companies. Generally higher beta (more volatile) than NYSE-listed stocks.
OTC (Over-The-Counter) Markets: Markets where trades occur directly between two parties without a centralized exchange. In equity markets, this refers to the OTC Markets Group where smaller or foreign companies (using ADRs) trade outside of public exchange listings (which are less liquid and less regulated). However, in the global financial system, the broader OTC market (covering Forex, bonds, and derivatives) is actually many times larger than all public stock exchanges combined.
Diplyzer covers all major US exchanges and over 60 international markets including the LSE (London), TSX (Toronto), ASX (Sydney), HKSE (Hong Kong), JPX (Tokyo), and BSE/NSE (India).
Market Capitalization: Understanding Company Size
In this section
Stock Screening: Finding the Best Stocks to Trade or Invest In
Learn how to screen stocks using technical, fundamental, and alternative data filters — and how to use Diplyzer's AI to run custom stock screens across the S&P 500, Nasdaq, and global markets.
IPO Investing: How to Research and Trade New Listings
Learn how to research and trade IPOs — from reading the S-1 prospectus and evaluating lock-up expirations to understanding the first-day pop, post-IPO base formation, and how Diplyzer analyzes new public companies.
Earnings Season: How to Trade Quarterly Reports
A complete guide to trading earnings season — how to position before reports, interpret beats and misses, trade post-earnings reactions, and use Diplyzer to analyze earnings across the entire market in real time.
Sector Rotation: Following Institutional Money Through the Market Cycle
Master sector rotation investing — understand the economic cycle, which sectors lead and lag at each phase, how to identify rotation in real time, and how to use Diplyzer to track where institutional money is flowing.
AI for Stock Market Analysis: From Research to Decision in Minutes
How AI transforms stock market research — from hours of manual fundamental and technical analysis to instant multi-dimensional stock analysis. Learn how Diplyzer covers the entire equity research workflow.