Investors battered by surging energy prices, disappointing economic data and the ongoing credit crisis will have something else to worry about this week - second-quarter corporate results.

The unofficial start to earnings season takes place Tuesday when aluminum producer Alcoa Inc. posts results. General Electric Co. on Friday will also be among the companies reporting.

The pair of Dow Jones industrials could give Wall Street a glimpse of what to expect when hundreds of other companies report results throughout the month. Not only are investors concerned that companies can't beat already lowered expectations, but they'll also be focused, undoubtedly with some skepticism, on what corporate executives forecast for the second half of 2008.

"The earnings, which are a reflection of the economy in general, have been going down and unfortunately there's a lot of concern it will go down a lot more," said Howard Silverblatt, Standard & Poor's senior index analyst. "How long can they continue through the storm? Nobody believes the 'worst is behind us' comments from the CEOs because they can't predict where this economy is going."

Earnings from members of the S&P 500 are forecast to be down 10 percent for the second quarter. The nation's banks and brokerages are likely to lead the pullback with another disappointing quarter.

Companies like Merrill Lynch & Co. and Citigroup Inc. are again expected to write off billions of dollars of assets rendered nearly worthless because of the global credit crisis. Since last year, banks have written down nearly $300 billion - and that is not expected to let up.

Financial stocks last year contributed $60.7 billion of earnings to the overall S&P, and this time around the number is expected at $24.6 billion, according to S&P. And, in a demonstration of how dominant financials are, Silverblatt said earnings for the S&P 500 would rise 9 percent during the second quarter if banks and brokers were stripped out of it.

Wall Street finished last week with another decline, with the Dow Jones industrials down 0.51 percent, the Standard & Poor's 500 index down 1.21 percent and the Nasdaq composite index down 3.01 percent. While that was a less steep drop compared to the week before, investors clearly are showing dissatisfaction with the economy - especially higher energy prices.

Investors are expected to remain anxious this week as crude oil approaches $150 a barrel. On Thursday, oil touched a trading high of nearly $146 before it settled at a record $145.29.

The approximately 50 percent jump in the price of oil this year has weighed on both businesses and consumers and posed a challenge to Federal Reserve policymakers who are trying to keep the economy out of a prolonged downturn.

Low interest rates have weakened the dollar, which has in turn made oil more expensive. Now, with consumers forced to pay more at the gas pump, Wall Street is worried about a broad slowdown in spending - a serious blow to the economy as consumer spending accounts for more than two-thirds of U.S. economic activity.

Investors will be looking to a light flow of economic data next week for insights into how surging energy costs are affecting the economy.

On Tuesday, the National Association of Realtors reports on pending sales of existing homes. The May index is expected to come in at 87.0, according to the median estimate of economists surveyed last Wednesday by Thomson Financial/IFR. That would be down from a reading of 88.2 in April.

On Thursday, the Labor Department releases its weekly reading on unemployment claims. Economists anticipate a slight rise of 1,000 to 385,000.

On Friday, the University of Michigan releases its preliminary reading on July consumer sentiment. Economists expect the index to slide to 56.0 from 56.4 in June.

Also Friday, the Commerce Department reports on the U.S. trade deficit. After increasing to $60.9 billion in April, the trade gap is expected to have widened again in May to $62.3 billion.

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AP Business Writers Tim Paradis and Madlen Read contributed to this report.

Wall Street capped a shortened trading week with a mixed finish Thursday after some uneven economic data: news of a contraction in the nation's services sector and a tame reading on employment. But stocks still had their third dismal week in a row, with the major indexes again posting losses as worries about rising oil prices and the fallout from the credit crisis dogged the market.

Stocks fluctuated in volatile trading Thursday on mixed economic news: a contraction in the nation's services sector and a mostly tame reading on employment. The Dow Jones industrial average, the biggest gainer among the major indexes, at times rose more than 100 points in part because of a rebound in General Motors Corp.

Aluminum producer Alcoa Inc. announced Tuesday that it will look into buying a stake in a refinery project with a state-owned minerals development company in Vietnam.

Of the 10 best-paid CEOs at Standard & Poor's 500 companies in 2006, six made less money last year. Three have since left their posts. Here's a rundown of how they fared. CEOs are listed with the companies they headed in 2006.

Wall Street tumbled Wednesday as oil prices rebounded, fanning concerns that inflation will further pinch consumers and lead central banks to raise interest rates. The Dow Jones industrial average fell more than 200 points to its lowest close since mid-March.

Wall Street tumbled Wednesday as oil prices rebounded, fanning concerns that inflation will further pinch consumers and lead central banks to raise interest rates. The Dow Jones industrial average fell more than 200 points to its lowest close since mid-March.

Stocks that moved substantially or traded heavily Wednesday on the New York Stock Exchange and Nasdaq Stock Market:

Wall Street fell sharply Wednesday as oil prices rebounded, aggravating concerns that inflation may lead the world's central banks to raise interest rates. The Dow Jones industrial average fell more than 150 points.

Stocks closed mixed Monday, with Wall Street exhausted from last week's swoon and still nervous about the effect of bank losses and energy costs on the economy.