Investopedia
Investing: How Do Cash Flow and Free Cash Flow Differ?

“Cash flow” and “free cash flow” are financial metrics to determine a company’s liquidity. However, there are distinct differences between the two that allow investors to see how a company generates cash and how it spends it.
Mortgages: Principal, Interest, Taxes, Insurance (PITI)

Principal, interest, taxes, and insurance (PITI) are the components of a mortgage payment. Specifically, they are the principal amount, loan interest, property tax, homeowners’ insurance, and private mortgage insurance premiums.
Investing: What Is the Rule of 70?

The rule of 70 calculates the number of years it takes for an investment to double in value. It is calculated by dividing the number 70 by the investment’s growth rate to compare investments with different annual interest rates.