NEW YORK (CNNMoney.com) - Energy and earnings are likely to get the attention of investors Monday as they determine if U.S. markets can continue last week's rally.

U.S. stock futures were slightly lower, but a comparison to fair value indicated a flat or mixed opening for stocks.

Oil prices were down in early trading as OPEC oil ministers gathered in Vienna, Austria, for a meeting Tuesday. The March light crude futures contract for NYMEX fell 28 cents to $67.48 a barrel in electronic trading, while the March contract for Brent crude lost 21 cents to $66.03.

Exxon Mobil (Research) is expected to report improved fourth-quarter earnings, with analysts forecasting that it will report annual profit of nearly $32 billion, which would be a U.S. corporate record. Large oil earnings in the third quarter spurred a Senate hearing and talk of Congress imposing a windfall profit tax.

Major markets in Asia closed higher Monday, although many markets were closed for the lunar new year. Major European markets were mixed in early trading.

In other economic news, the government reports on consumer spending and income for December. Economists surveyed by Briefing.com forecast that spending by consumers gained 0.8 percent in the month after a 0.3 percent rise in November, while personal income rose only 0.4 percent, also up from a 0.3 percent rise in November.

Treasury prices fell, lifting the yield on the benchmark 10-year note to 4.53 percent, from 4.51 percent late Friday. The dollar was up against both the euro and the yen.

In corporate news, Citigroup (Research) and hedge fund Cerberus Capital Management may make a joint bid for GMAC, the finance arm of embattled automaker General Motors (Research), according to published reports. Wachovia (Research), the No. 4 U.S. bank, may also join with a private equity firm to make a bid, possibly Blackstone Group or Kohlberg Kravis & Roberts, according to the reports.

No. 1 retailer Wal-Mart Stores (Research) reported Saturday that it sees January sales gains at the top end of its earlier guidance.

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