Similar to Dupont, I selected Eastman Chemical (NYSE: EMN) as a stock to avoid due to rising input prices and low margins. It is a simple formula that cannot be broken: If a company cannot pass along higher costs, it will make less.

The market has yet to grasp that concept with respect to EMN. The stock has more than doubled since bottoming in March and has skyrocketed during the second quarter. This is in stock contrast to the poor performance at Dupont.

With such uncertainty, following an absolute return strategy continues to offer investors the biggest bang for their buck. There is no sense in guessing where the market will be down the road.

Instead, buy cheap stocks and sell stocks that are expensive. Then blend the two approaches together in one portfolio and chances are you'll make money.

Even with a huge rally in stocks, the S&P 500 ended the second quarter with a year-to-date gain of 1.78%. That is a vast improvement compared to the 11% loss at the end of the first quarter, but it's a minimal return for taking risk in the stock market.

Investors need to do better -- and they can.

Here are some highlights from this past week's earnings coverage from BloggingStocks:

• Acuity Brands Inc. (NYSE: AYI) beat second-quarter estimates on increased productivity and new products.
• Advanced Micro Devices (NYSE: AMD) cut its outlook and announced job cuts.
• Alcoa Inc. (NYSE: AA) missed first-quarter earnings estimates but beat revenue expectations.
• Circuit City Stores Inc. (NYSE: CC) surprised Wall Street by posting a second-quarter profit.
• Dell Inc.'s (NASDAQ: DELL) rosy 2008 forecast is based on cost cuts, overseas growth, share buybacks.
• DuPont & Co. (NYSE: DD) raised its first-quarter outlook on strength in agriculture and emerging markets.
• Eastman Chemical Co. (NYSE: EMN) raised its first-quarter guidance on strong sales and higher prices.
• EXFO Electro-Optical Engineering (NASDAQ: EXFO) beat estimates and announced an acquisition.
• Foundry Networks Inc. (NASDAQ: FDRY) slashed its first-quarter outlook, blaming the weak economy.
• Genentech Inc. (NYSE: DNA) beat first-quarter earnings estimates, but not revenue expectations.
• General Electric Co. (NYSE: GE) missed earnings expectations and lowered its guidance.
• Novellus Systems Inc. (NASDAQ: NVLS) trimmed its first-quarter earnings and revenue forecasts.
• Progressive Corp. (NYSE: PGR) beat estimates though first-quarter profits fell due to lower premiums.
• Rite Aid Corp. (NYSE: RAD) swung to a loss in the fourth quarter on acquisition costs and a tax charge.