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Market Basics: key terms, formulas and examples

Stocks are small ownership shares traded on an exchange. Brokers execute orders, indexes track the market, and bull or bear markets describe the mood.

Example

A limit order buys only at the price you choose.

Takeaway

Understand why a price moves before you act on it.

Key terms

Stock exchange
A marketplace where shares are bought and sold.
Bull market
A period when prices rise and investors feel optimistic.
Bear market
A period when prices fall and investors feel pessimistic.
Market capitalization
Share price times number of shares: a company's market value.
Ticker symbol
A short code that identifies a company's stock on an exchange.
ETF
A fund holding many assets that trades like a single stock.
Share price
The current cost of buying one share.
Broker
Someone who buys and sells securities for clients.
Bid-ask spread
The gap between the buying and selling price.
Earnings report
A company's results published each quarter.
Stock index
A measure of how a group of shares is performing.
Market order
An order to buy or sell at the current price.
Limit order
An order set at a specific price.
Penny stock
A very low-priced, risky share.
Stock market crash
A sudden, sharp drop in prices.

Formulas

Market capitalizationPrice × Shares
Earnings yieldEPS ÷ Price × 100
Price-to-bookPrice ÷ BVPS
PEG ratioP/E ÷ g
Payout ratioDPS ÷ EPS × 100
Current yieldC ÷ P × 100

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