John Studzinski’s departure from Blackstone Group LP says something about the buyout firm and the value of rainmakers in the second half of their career. He’s among the finance industry’s most successful, best-connected dealmakers, with a global network and wide-ranging interests. Yet that didn’t make him invaluable to Blackstone, and suggests that advisers add most value when they work for ...

The oil market has changed a lot over the past decade. Here, for example, is the latest data on US imports and exports of crude oil and petroleum products, released by the Energy Information Administration at the end of last month: The US has gone from a big-time net importer of oil to a small-time one. The latest base-case forecast ...

Nikola Tesla electrified the world in the 19th century when he created the alternating-current motor and anticipated 21st century mass communication with his work on wireless transmission of voices, images and moving pictures. Unlike the Serbian-American inventor who died destitute at 86 in 1943, his namesake Tesla Inc. is so esteemed eight years after becoming a public company that its ...