James Chen, CMT is an expert trader, investment adviser, and global market strategist. Andy Smith is a Certified Financial Planner (CFP®), licensed realtor and educator with over 35 years of diverse ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Amanda Bellucco-Chatham is an editor, writer ...

Efficiency is, by definition, “the peak level of performance that uses the least amount of inputs to achieve the highest amount of output.” While the concept itself is, in theory, straightforward, ...

Many motors are labeled super, top, and premium efficient, but until a couple years ago, there wasn't any quantitative definition of the term. Then in Many motors are labeled super, top, and premium ...