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Finance Concepts Explained
Capital Markets & Investments at Columbia Business School | Simon Oh

The Order Book

How stock exchanges match buyers and sellers

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Two Types of Orders

  • When you want to buy or sell a stock, you send an order to the exchange. There are two main types:
  • Limit orders: You specify both quantity AND price. "Buy 100 shares at $576.40 or better." No guarantee of execution—your order might sit unfilled forever.
  • Market orders: You specify only quantity. "Buy 200 shares at whatever price is available." Guaranteed execution, but you don't control the price.
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