Despite falling oil prices, traders in recent weeks have booked just a few tankers to store cargoes at sea as higher freight costs outweigh any profit play for now. This is partly due to expectation among tanker owners for higher rates in the final quarter of the year. That means oil traders will have to pay a premium to lease vessels for longer periods as shipping firms remain reluctant to tie up vessels given the potential for quicker earnings. "Owners will not do storage and miss out on the spot rallies to come," a tanker market source said. "There is not much incentive for owners. For the first time in several years, the price curve for Brent crude oil futures is now fully in "contango", meaning that every ICE futures month is trading below the subsequent month.