Earnings season unofficially begins after the markets close today, and traders are pushing stocks lower on concern about the upcoming numbers. Analysts and investors are lowering expectations, and today this has pushed the Dow Jones Industrial Average (^DJI -0.11%) down 0.7% and the S&P 500 (^GSPC 0.02%) 0.9% lower as of 3:30 p.m. EDT.

The International Monetary Fund didn't help sentiment when it lowered its growth guidance. It now expects 3.3% economic growth in 2012, rather than 3.5%. It pegs growth for 2013 at 3.6%.

Meanwhile, Alcoa (AA), the company that's actually reporting earnings today, is up 1.2%. The company settled a four-year legal battle with Aluminum Bahrain BSC for $85 million and agreed to a long-term sales agreement. This may have some impact on trading today, but the big numbers come out after the close. Analysts expect the company to report revenue of $5.54 billion and breakeven earnings.

Tech companies with a consumer focus are leading the decliners on the Dow today. Intel (INTC 0.64%) has fallen 2.7%, and Microsoft (MSFT 0.37%) is down 1.7%. Intel said it plans to lay off 7,100 employees from its McAfee unit -- a sign that the acquisition isn't going as well as planned. Intel and Microsoft are both very dependent on global economic growth, particularly in emerging markets, and the IMF's forecast has investors thinking cautiously.

Elsewhere in the market, oil is rising on supply concerns. The commodity is up 3.3% today on fear that the conflict in Syria will spread and disrupt supply. This continues the theme of the day of an overly cautious market as we head into earnings season.