Claim: At the same time gas prices have increased, "the share of the oil market controlled by speculators has more than doubled over the past 10 years."
Fact-check: The share of speculators in the oil market has doubled in the past 10 years, says Bill Nelson
Verdict: half-true
Organisation: PolitiFact
Author: Katie Sanders
Date published: 2012-04-24T00:00:00