NEW YORK (CNN/Money) - Stock futures rose slightly Tuesday ahead of a Federal Reserve policy meeting that was expected to result in a shift in the Fed's attitude toward interest rates.

For details of Monday's gains, click above

Early Tuesday, S&P and Nasdaq futures pointed to gains at the open.

The Fed is not expected to change interest rates, which have not been raised in three years. But investors will be looking at the statement expected to be released at 2:15 p.m. ET for clues about when a rate hike will come.

The markets are expecting a move at the August meeting. But if the statement is seen as raising even greater concern about the risk of inflation, it could prompt investors to anticipate a June rate hike instead.

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The Dow Jones industrial average and Nasdaq composite index both got a bump up Monday on such things as a rise in semiconductor sales and an increased dividend from Boeing (BA: Research, Estimates), a Dow component. The Dow rose 0.9 percent, while the Nasdaq was higher by 1 percent (see chart for details).

Asian-Pacific stocks ended higher Tuesday, following Wall Street's lead; Tokyo was closed again for the Golden Week holiday. European markets were mixed in early trading. (Check the latest on world markets)

Among U.S. stocks trading in Europe, Procter & Gamble (PG: Research, Estimates) was down about one-quarter of a percent. The Wall Street Journal reported Tuesday that a new study show a P&G testosterone patch has proven effective in treating a form of female sexual dysfunction.

Treasury prices were slightly higher, with the 10-year note yield at down to 4.49 percent. The dollar fell more than a cent against the euro and was moderately weaker versus the yen.

Oil climbed to a 13-year high due to concerns about violence in the Middle East and low U.S. fuel inventories. Brent oil futures soared 69 cents to $34.92 a barrel in London, where gold was lower.

A government report on factory orders in March is expected to show a 2.4 percent increase, according to analysts surveyed by Briefing.com. That's up from a 0.3 percent rise in February. The report is one of the last reading of economic conditions in March. Several surveys of manufacturing in April have showed stronger rise in the more recent period.

In corporate news, Priceline.com reported better than expected earnings compared with a loss in the year-earlier period. But while the company issued second-quarter guidance roughly in line with forecasts, it issued a third-quarter outlook well below consensus estimates.

Priceline also announced it was paying $20.8 million to buy a controlling stake in Travelweb, an online service created by many of the nation's hotel chains.

Shares of Priceline (PCLN: Research, Estimates) fell 56 cents to $24.31 in after-hours trading following the announcement.

Siebel Systems (SEBL: Research, Estimates) on Monday named former IBM executive Michael Lawrie as CEO, replacing founder Thomas Siebel, who will retain his title as chairman. Shares of Seibel lost 31 cents to $10.31 in after-hours trading following the announcement.

Tyco International (TYC: Research, Estimates) reported a rise in fiscal second-quarter earnings Tuesday to 37 cents a share, edging past the consensus forecast of 36 cents a share from analysts surveyed by First Call. The conglomerate also issued guidance for better-than-expected results for the third quarter and full fiscal year.

Clear Channel (CCU: Research, Estimates), which dropped radio shock jock Howard Stern from its stations during the quarter due to increased focus on on-air obscenity, reportedfirst quarter EPS of 16 cents, excluding special items, topping forecasts of 14 cents as well as year-earlier results of 12 cents.

But the company also disclosed that Chairman and CEO Lowry Mays had brain surgery Friday to relieve swelling and a blood clot.

Defense contractor Northrop Grumman (NOC: Research, Estimates) reported earnings from continuing operations of $1.25 a share, up from 91 cents a share on that basis a year earlier and slightly better than the $1.21 forecast from First Call.

Grocer Safeway (SWY: Research, Estimates), is also set to report results. The company, which Monday announced it would bow to shareholder pressure by naming three new independent directors and expensing options, is forecast to post a 49 percent decline in earnings per share to 23 cents.