1. After official data for US stocks has revealed , the rise in oil inventories by about three million barrels and more than expected, and gasoline stocks by more than two million barrels
1.1. So Oil prices was decreasing the whole week due to that
2. On Thursday, Donald Trump slapping 25% tariff on steel imports
2.1. Gold prices increase as investors considered it as a 'safe investment'
2.2. Oil prices has decreased
3. On Friday, Wall Street stocks recovered from session lows als the Standard & Poor's 500 and Nasdaq Composite Index has increased
3.1. So Oil prices increased
4. on Friday, as markets begin to accept the Federal Reserve's new policy about the level of short-term interest rates , which is likely to include a four-fold rate hike this year.
