Oil prices at both the sides of the Atlantic advanced, but struggle to keep the momentum going as investors consider the possibility of a failure of joint OPEC and non-OPEC output freeze. At the time of writing, WTI futures were largely unchanged on the day around $37.70/barrel. Brent oil was down largely unchanged on the day as well around $39.86 levels. Prices strengthened in Asia and early Europe on the back of falling US supply. US crude-oil supplies fell by 4.9 million barrels last week, the Energy Information Administration said Wednesday. Markets were expecting a rise by 3.3 million barrels. However, gasoline stocks rose by 1.4 million barrels following six consecutive weeks of declines. Furthermore, investors are getting nervous as Saudi and Iran are having a tough time coming to common terms. For more information, read our latest forex news.