Oil prices have slightly risen amid growing optimism about a deal between Greece and its international lenders which could avert the bankruptcy of the eurozone country.

Brent crude for August delivery rose 53 cents at $63.55 a barrel. Brent oil price fell nearly 2 percent on Friday amid rising concerns over a potential Greek debt default.

Meanwhile, US crude gained 40 cents to reach $60.01 a barrel.

The speculation about a breakthrough in talks aimed at resolving Greece’s debt crisis has already stirred up global markets.

Major European and Asian stocks markets closed higher amid hopes that Greece and its lenders will reach a deal to avert cash crunch.

Paris and Frankfurt markets closed 3% higher while Japan's Nikkei was 1.3% up on Monday.

Meanwhile, the positive sentiment sent US stocks higher on Monday, with Nasdaq Composite jumping 40 points, to 5,157, the highest level ever.

Also, the Dow Jones industrial average soared 120 points, or 0.6 percent, to 18,129.

HA/HA