Learn how the market really works

When you buy a share of stock, you legally own a fraction of that business. Own 100 shares of Apple? You own one ten-billionth of Apple — but it's yours.

Owning shares is what lets you participate in a company's growth (and losses) without running it yourself.

Every publicly traded company and fund has a 1–5 letter ticker symbol you use to look it up. Apple is AAPL, Microsoft is MSFT, the S&P 500 ETF is SPY.

Always trade by ticker, not by name — similar-sounding company names get confused all the time.

Some companies share their profits directly with shareholders by mailing out a cash payment every few months. That payment is called a dividend.

Dividends let you earn money from a stock even when the price isn't going up. Many retirees rely on them for income.

Market cap = share price × number of shares outstanding. It's the price tag for buying the entire business at today's price.

Bigger market caps tend to be more stable, smaller ones can grow faster but swing more. It's the single best one-number 'size' check.

Volume counts the shares that changed owners during a given period. High volume = lots of attention. Low volume = quiet.

Big price moves on big volume are taken more seriously than the same move on tiny volume.

A bull market is a sustained period of rising prices (typically +20% off recent lows). A bear market is the opposite — a sustained drop of 20%+. People also describe individuals as 'bullish' (optimistic) or 'bearish' (pessimistic) on a stock.

Your strategy can change based on the environment. In bear markets, defensive stocks and cash often outperform.

An index tracks a bundle of stocks to measure how the market (or a slice of it) is doing. The S&P 500 = 500 big US companies. The Nasdaq is tech-heavy. The Dow is 30 big industrials.

When people say 'the market is up 1%', they almost always mean an index. You can also invest in an index by buying an ETF that tracks it (like SPY for the S&P 500).

Brokers like Fidelity, Schwab, Robinhood, and Webull act as the middleman between you and the stock exchanges. EasyStox is research — your broker is where you actually buy.

Different brokers offer different features, fees, and tools. Most charge $0 commissions on US stocks today.

Your portfolio is the full collection of stocks, ETFs, bonds, and cash you hold. Spreading money across many things (diversification) is the most reliable way to lower risk.

A single stock can go to zero. A diversified portfolio of 20+ holdings almost never does.

If a stock trades at $100 and the company earned $5 per share last year, its P/E is 20. You're paying $20 today for every $1 of profit the company makes per year.

P/E lets you compare 'expensive' vs 'cheap' across companies of any size. Roughly: <15 = cheap, 15–25 = average, >25 = expensive (but compare within a sector — tech P/Es are normally higher).

EPS = Total profit ÷ Number of shares. It's the per-share scorecard for company profitability. Negative EPS means the company lost money.

Growing EPS over time is one of the clearest signs of a healthy business. Falling or negative EPS deserves a hard look.

A beta of 1.0 means the stock moves in line with the market. 1.5 means it typically swings 50% more than the market (riskier). 0.7 means it swings 30% less (calmer).

Beta tells you what kind of ride to expect. High beta = more potential reward, but bigger drops. Low beta = smoother, but slower in bull markets.

Together they frame where today's price sits in its recent range. Near the high = strong momentum. Near the low = weak — could be a bargain or a falling knife.

Knowing the range stops you from overreacting to a single day. 'Down 3% today' can still be 'up 40% this year'.

A stock with a 4% yield doesn't necessarily 'earn' you 4% — if the price also dropped 10% that year, your total return was actually –6%.

Don't chase yield in isolation. The point of investing is total return, not just the dividend.

Technology is a sector. Inside it, 'Semiconductors', 'Software — Application', and 'Consumer Electronics' are industries. Sector helps you diversify; industry helps you compare apples to apples.

Compare P/E and growth within the same industry. Tech and utilities live in different universes.

An ETF with a 0.03% expense ratio costs $3/year for every $10,000 invested. A 0.75% expense ratio costs $75/year for the same. Fees come out automatically — you never see a bill.

Fees compound. Over 30 years, a 1% higher expense ratio can cut your final value by ~25%. Lower is almost always better, all else equal.

Four times a year, every public company reports revenue, profit (EPS), and what they expect next quarter. The stock often moves a lot on the day — sometimes 10%+ — based on whether results beat or miss expectations.

Earnings season is the biggest scheduled source of stock-moving news. Knowing when your stocks report helps you avoid surprises.

A volatile stock can move 5%+ in a single day; a calm one barely budges. Beta is the most common way to measure it.

Volatility isn't the same as risk of losing money forever, but it does affect how comfortable you'll be holding through dips.

Big-name stocks trade millions of shares per day — you can buy or sell instantly at the displayed price. Tiny micro-cap stocks may trade only a few thousand shares, so your own order can push the price around.

Low liquidity = wider spreads, slippage, and a harder time exiting in a panic.

The bid is what someone will pay right now; the ask is what someone wants. The spread is the difference — and it's effectively a hidden cost of trading.

Tight spreads (a penny or two) mean a liquid stock. Wide spreads mean you instantly 'lose' the spread the moment you buy.