Never before has the U.S. had so much oil spurting up out of the ground and sloshing into storage tanks around the country. There's so much oil that the U.S. now rivals Saudi Arabia as the world's largest producer.
But there has been some concern that the U.S. will run out of places to put it all. Some analysts speculate that could spark another dramatic crash in oil prices.
Everyone in the oil trading business needs information. One thing they want to know these days: How full are oil storage tanks in places like Cushing, Okla.?