Rising prices of Middle Eastern crudes have opened the arbitrage window for West Texas Intermediate (WTI) to flow to Asia, which is set to buy higher volumes of the U.S. crude grade in the coming weeks, trade sources have told Reuters. Key grades from the Middle East, such as Dubai and Murban, have seen their prices rise in recent weeks on the back of strong demand for high-sulfur crude in Asia and reduced shipments of Murban. Moreover, the prices for Middle Eastern crudes going to Asia have jumped this week amid concerns that…