What does buying stock on margin mean?

Buying on margin is borrowing money from a broker in order to purchase stock.

Explanation:

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when the account is concentrated, a margin call occurs easily with a slight price drop.

Explanation:

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most people now work in jobs where they do one  kind  of work; they are carpenters, bankers, cooks, mechanics, and so forth. likewise, most  businesses produce  only certainkinds  of  goods  or  services, such as cars, tacos, or gardening  services. this feature of  production  is known as specialization.