From Iran with love:
Iran Doubles Oil Stored in Tankers, Bolstering Rate
May 2 (Bloomberg) -- Iran, OPEC's second-largest oil producer, more than doubled the amount stored in tankers idling in the Persian Gulf, sending ship prices higher as demand for some of its crude fell, people familiar with the situation said.
The 10 tankers hold at least 20 million barrels of oil, equal to about 5 days of the country's output, said the people, who asked not to be identified because the information isn't public. Rates for tankers have more than tripled since April 8, based on data from the Baltic Exchange and ship-fuel prices.