Why is the U.S. dollar losing steam? The short version: Falling demand for the currency drags its value down. Since the Federal Reserve is likely to cut interest rates soon, investors aren’t racing to buy U.S. bonds. And you need U.S. dollars to buy U.S. bonds … you get the picture. In this episode, more on currency fluctuations — and why the dollar losing value isn’t all bad. Plus: Businesses investing in themselves drove up second-quarter GDP, China has a burgeoning black market for Nvidia semiconductors and human bodies make great compost.