Profit margin measures a company's profitability, showing what percentage of sales becomes profit. Learn its types, uses in business, and why it matters to investors.

FINRA has adopted significant changes to its margin rule with potential impacts on active investors. If you currently engage in or are considering an active investment strategy, be sure to understand ...

One measure of stock market speculation among investors has plunged to levels not seen since the low of the dot-com bubble burst in 2002, according to a Friday note from Fundstrat's Tom Lee. FINRA ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Eric's career includes extensive work in ...

Investing requires funding. If you find yourself coming up short, an investment broker will commonly allow you to purchase stocks or other assets on margin. But that doesn’t mean it’ll fully fund the ...

A key risk-management tool in the complex world of derivatives margin trading is variation margin. Variation margin is used to fully collateralize derivative contracts and ensure the stability of the ...

If you currently engage in or are considering an active investment strategy, be sure to understand what's changing and how ...