Crude pushed higher in choppy trading as advances by Sunni insurgents in Iraq fueled concerns over a potential disruption to oil exports.
The Australian dollar fell more than half a percent against the U.S. dollar on Tuesday after the RBA expressed economic recovery doubts.
Asian equities finished a choppy session mixed on Monday with escalating violence in Iraq weighing on sentiment.
Stocks rose on Friday, with equities on track for weekly losses.
U.S. stock index futures traded lower on Monday, with risk aversion growing due to concerns about Iraq, and to a lesser extent, Ukraine.
European shares closed slightly down flat on Friday amid concerns of escalating tensions in Iraq and rising oil prices.
Sectarian violence in Iraq sent oil skyrocketing, propelling Brent and West Texas Intermediate up two percent.
Palladium tumbled to a one-month low as investors awaited confirmation that South Africa's longest mining strike would end soon.
Asian equities turned mixed on Friday amid concerns about violence in Iraq and signs of improving economic activity from China.
The dollar dipped versus the yen, although potentially decisive events such as the Federal Reserve meeting midweek limited movements.
U.S. stock index futures were little changed on Friday, after falling sharply a day earlier when stocks were hit by concerns about violence in Iraq.
The Treasury auctioned $13 billion of 30-year bonds at a high yield of 3.444 percent. The bid-to-cover ratio, an indicator of demand, was 2.69.
European shares closed around the flatline on Thursday, paring earlier gains.
Retail sales missed expectations, and state unemployment benefits claims climbed higher than expected.
The euro neared a four-month low versus the dollar and a 1-1/2 year trough against sterling on Wednesday.
Gold settled at its highest level in nearly three weeks on Thursday after US retail sales and jobless claims came in below expectations.
U.S. stocks fell on Wednesday after the World Bank cut its outlook for global growth.
Stocks declined on Thursday after retail sales figures disappointed and energy costs rose.
U.S. stock index futures pointed higher on Thursday, with retail sales figures set to be the main focus for the session.
Bonds pared some gains on Wednesday after the U.S. government's auction of 10-year Treasury notes, the second of three debt auctions this week.
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Turkey only procures oil and gas from known sources and those who accuse it of buying from ISIS need to prove it, President Erdogan said on Thursday.
Shares of Spanish renewables giant Abengoa were down around 25 percent, a day after the company began insolvency proceedings.
The U.K. will put "security first," the finance minister said. Plus, he scrapped plans to cut welfare payments to low-paid workers.