Mary Hall is a editor for Investopedia's Advisor Insights, in addition to being the editor of several books and doctoral papers. Mary received her bachelor's in English from Kent State University ...

This article explains how to extend the battery lifetime of a device by adding a nanopower converter to an existing system, ...

Witthaya Prasongsin / Getty Images Fixed costs and variable costs are the two major inputs used by a company's management team to determine budgets and control expenses in relation to revenues.

However, your bill is not fixed. You pay based on your actual consumption. Variable Tariff: Your standing charge and unit rates can increase or decrease, based on changes in wholesale energy costs ...

A fixed annuity offers more stability and predictability than other types of annuities, at the cost of potential greater earnings on your principal. Other types of annuities, like variable ...

Costs are split into three main categories: fixed, variable, and total costs. Fixed costs are costs for a business that do not change, no matter what the level of output for the business.

The interest on a fixed-rate credit card issued by a credit union tends to be lower than that of a variable-rate card. Some credit unions offer fixed-APR credit cards with rates as low as 6.99%, a far ...

This tax treatment applies to fixed-rate, fixed-indexed, variable and income annuities. Here are some key tax wrinkles regarding annuities: Your original investment — the purchase premium(s ...

Standout benefits: Nationwide has over 90 equities, bonds and fixed accounts to choose from, giving variable annuity buyers more control over their portfolio. The $25 annual maintenance fee for ...

The number-crunchers at Moneyfactscompare.co.uk have registered 3,560 fixed and variable-rate offerings as of early February – more than ever recorded in their electronic archive dating back to ...