Stocks are indicated lower on weakness overseas and falling commodities prices Tuesday. Less than thirty minutes before the opening bell, stock index futures indicate that the Dow Jones Industrial Average might lose about 20 points at the open.

Trading was cautious overseas before the opening bell on Wall Street. While Asia’s equity markets finished mixed, benchmarks are broadly lower across Europe. UK’s FTSE is down .7 percent, France’s CAC 40 lost .6 percent, and Germany’s DAX slipped .6 percent.

Weakness in Europe comes as Greece’s Prime Minister George Papandreou travels to Washington to meet with President Obama Tuesday. In a speech to the Brookings Institute Monday, Papandreou said his country has not requested a bailout, but hopes European support will ensure his debt ridden country can borrow from global financial markets.

Meanwhile, the euro is taking a hit, falling .0085 to 1.3546 against the buck. The dollar fell .52 to 89.76 against the Japanese yen.

With no economic data to guide the market action, bonds are bid on the spreading problems in Europe and after China reiterated its commitment to buying Treasurys. The benchmark ten-year note is up 8/32nd and now yields 3.68 percent.

However, euro weakness is weighing on commodities. Crude oil lost $1.37 to $80.50 a barrel and gold fell $11.50 to $1112.50 an ounce.

Among the stocks to watch Tuesday, Cisco (CSCO) moves into the spotlight at 11:00 eastern time. The networking company is expected to announce a new product that will “forever change the internet,” which is possibly a technology for wireless carriers.

Texas Instruments (TXN) is down 1.4 percent after the company offered in-line guidance in its mid-quarter update after the closing bell yesterday. TIVO slipped 1.5 percent, even after the company posted earnings and revenues that easily topped analyst estimates late Monday. H&R Block (HRB) is also lower on earnings. Navistar (NAV) and Collective Brands (PSS) might see some pre-earnings action ahead of earnings, due out after the closing bell.