Koch Brothers Worth $100 Billion Lead Oil Moguls on Rise

The world’s 400 richest people added $74.7 billion to their collective wealth this week as the U.S. labor market capped the biggest three-month jobs gain in 17 years.

Much of the gain was fueled by oil. Brent crude climbed more than 9 percent, adding to an 8.6 percent gain last week. It’s still about half the price it was in June.