The Baltic Exchange's assessment on freight rates for trans-Atlantic clean tankers saw a 160% jump on news of an explosion of a major US gasoline and gasoil pipeline. But brokers caution that the spike may be short lived if the pipeline resumes operations quickly.

The medium-range (MR) tanker rate spiked hit $19,333 per day, up from $7,586 per day on Monday and the highest since early March.