The Black-Scholes model remains the 2026 gold standard for pricing trillions in derivatives. It uses five key data points: stock price, strike, time, interest rates, and volatility. This math-heavy ...

Discover how negative convexity affects bond prices, key risks, and how to calculate it. Learn why mortgage and callable ...

When considering accepting a business loan, it's important to develop a repayment plan. Learn about the calculation formula, ...

Discover what a factor rate is and how to calculate it.

For years, Barbara Small fought to hold onto her house in Flatbush, Brooklyn, after it fell into foreclosure. On the day it finally went up for auction, she sobbed on the train ride to the Supreme ...

A friend of mine almost didn't do a balance transfer because of the $300 fee. He was nervous about paying that much up front -- totally fair. But once he ran the numbers and saw he'd save over $1,400 ...

There’s no universal safe or danger level. Ideal current ratios vary by industry. A current ratio of 1.0 means the company has $1 in current assets for every $1 in current liabilities. A ratio below 1 ...

Calculating the interest rate on a personal loan can be difficult. Most lenders use simple interest rather than compound interest, though, which makes the job a little easier. To calculate how much ...

If you have a savings account, you might want to know how much you’ll earn in interest for parking your cash there. Fortunately, calculating interest on a savings account is not as tough as you might ...

Kiah Treece is a former attorney, small business owner and personal finance coach with extensive experience in real estate and financing. Her focus is on demystifying debt to help consumers and ...

Find a company's periodic interest rate by dividing interest expense by total debt and multiplying by 100. To annualize a quarterly rate, multiply the periodic interest rate by four. Use income ...

President Donald Trump introduced his “discounted reciprocal tariffs” on over 200 countries on April 2. Most countries receive a base tariff rate of 10%, but for countries receiving more, the rates ...