Today, oil prices were wavering between gains and losses with supply still seemingly insufficient to ease the market.

At around 09:20 GMT (11:20 a.m. CET), a barrel of North Sea Brent crude for September delivery was up 0.79 percent at $99.88. U.S. West Texas Intermediate (WTI) for August delivery was up 0.19 percent at $95.96. The two world oil references have lost more than 8% over the week. To this end, Joe Biden went to Saudi Arabia today, after Israel to encourage OPEC (Organization of Petroleum Exporting Countries) to pump more crude to lower prices. Iran said Friday that it was even more determined to keep its interests in any agreement on the nuclear issue, after the signing of aafter the signing of an Israeli-American strategic partnership with Tehran during the visit of Joe Biden in Israel.