Question: How does buying on a margin work in the stock market?

How does buying on a margin in the stock market work. Does it double the money invested or what. Like lets say had 5,000 dollars would on a margin be 10,000. And if says made 2 thousand profit end of day. so 1200. Would the intreast rate which i heard is 7% is it on the profit or on the whole money itself.

Answer:

Margin means buying securities, such as stocks, by using funds you borrow from your broker. Buying stock on margin is similar to buying a house with a mortgage.
If you buy a house at a purchase price of $100,000 and put 10 percent down, your equity (the part you own) is $10,000, and you borrow the remaining $90,000 with a mortgage.
If the value of the house rises to $120,000 and you sell, you will make a profit of 100 percent (closing costs excluded).
How is that? The $20,000 gain on the property represents a gain of 20 percent on the purchase price of $100,000,
but because your real investment is $10,000 (the down payment), your gain works out to 200 percent (a gain of $20,000 on your initial investment of $10,000).

Buying on margin is an example of using leverage to maximize your gain when prices rise. Leverage is simply using borrowed money to increase your profit.
This type of leverage is great in a favorable (bull) market, but it works against you in an unfavorable (bear) market.
Say that a $100,000 house you purchase with a $90,000 mortgage falls in value to $80,000 (and property values can decrease during economic hard times).
Your outstanding debt of $90,000 exceeds the value of the property.
Because you owe more than you own, it is negative net worth.
Leverage is a double-edged sword.
A stock market or equity market is a public entity (a loose network of economic transactions, not a physical facility or discrete entity) for the trading of company stock and derivatives at an agreed price; these are securities listed on a stock exchange as well as those only traded privately.

Buying on margin simply means that you borrow money to buy the stock. Generally you can borrow up to half of the value. When you buy on margin you increase your return, but you also increase your risk.

For example, if you buy a stock with 50% margin (meaning you borrow half the money), then if the price of the stock goes up 10%, your return is 20%. On the other hand, if the price goes down 50%, you lose 100% (in other words, you lose all your money).

The interest rate is paid on the money you borrow.