When the Dow last set a record high in late 2007, the U.S. was worried about waning oil supplies and was producing about 40 percent less oil than now. But a technological breakthrough—the joining of hydraulic fracturing technology and horizontal drilling—has led to an energy revival.
When the Dow last set a record high in late 2007, the U.S. was worried about waning oil supplies and was producing about 40 percent less oil than now. But a technological breakthrough—the joining of hydraulic fracturing technology and horizontal drilling—has led to an energy revival.