The dollar advanced the most and other lower-yielding assets today, as traders switched on the alert-mode and grew extremely cautious ahead of the EU summit and sluggish debt-talks in Greece failed to sooth stoked markets.

German Chancellor, Angela Merkel, said Greece's aid program won't be wrapped up for good today because talks with banks over debt reduction aren't complete. The focus on Greece overshadowed progress toward a long-lasting rescue fund and stricter budget rules harmonized to stabilize the euro.

Meanwhile, Splinters between Greece and everybody else over the government's ability to implement spending cuts in exchange for bailout money continues.

Refreshing growth and Greece's debt are expected to highlight the agenda, as markets anticipate hearing what European leaders have to say on the creation of permanent rescue fund and how much closer they are to materializing fiscal rules in a new treaty.

The dollar index, which measures the performance of the U.S dollar against a basket of currencies including the euro, the pound and the Japanese Yen, rallied from the opening level of 79.02 to trade around 79.26, recording the highest level at 79.45 while lowest at 79.00.

traders sought treasuries for safe havens. Gold rose to trade around $1653.5 an ounce, from the opening level of $1644, recording the highest level of 1667.75 and lowest at 1642.98. Oil gained for the second day and currently trades around $100.66 a barrel from the opening levels of $99.65.

The euro dropped against the dollar ahead of the EU summit, sending the EUR/USD pair to traded around $1.3127 from the opening level of $1.3207, and recording the highest level of $1.3210 and lowest level of $1.3076.

The British Pound fell against the dollar as well, driving the GBP/USD pair to traded around $1.5683 from, the opening level of $1.5722, and recording the highest level of $1.5726 and lowest of $1.5654.

Finally, the dollar reversed its rally against the Japanese Yen, as the USD/JPY pair traded around ¥76.29 from the opening level of ¥76.74, while recording the highest level of ¥76.77 and lowest levels of ¥76.21.