Small-cap stocks opened lower after the opening bell, experienced a slight bump after the Consumer Confidence report was released at 10 a.m., but are continuing to slide in midday Tuesday trading. At 12:37 p.m. ET, the Russell 2000 (NYSE:IWM) was down 8.19, or 1.13%, to 717.18.

The Conference Board reported that April’s Consumer Confidence Index slumped to 62.3, the lowest level in five years, from a revised 65.9 in March. Economists expected the index, which has declined fourth months in a row, to decline to 61.

During a morning press conference, President Bush said Congress should allow more domestic energy production. Higher production would lower record-high gas prices, he said. Bush said gas prices have risen $1.40 per gallon since the Democrats won a majority in Congress, and pointed to stalled efforts to open drilling in Alaska’s Arctic National Wildlife Refuge, which would “likely mean lower gas prices.” The president will consider proposals by Sen. John McCain and Sen. Hillary Clinton to suspend the federal gas tax, but did not provide backing for the proposal. The President also noted that the economic stimulus package is in on the way.

Large-cap movers this morning included drug company Merck & Co. (NYSE:MRK), which was down 8% on news that the FDA rejected a new cholesterol drug. From an overall stock market picture, the news had a somewhat muted impact, because it lifted Merck competitor Abbott Labs (NYSE:ABT) by 3%. In addition, Visa (NYSE:V) posted decent earnings ahead of the opening, and the financial firm is up 1% in midday trading after dipping in earlier action.

Within the small-cap spectrum, LCA Vision Inc. (Nasdaq:LCAV) is down 17%, gapping lower on weak earnings. Intevac Inc. (Nasdaq:IVAC) was down 23% as well, also on earnings news, and TheStreet.com Inc. (Nasdaq:TSCM) was off 13% on soft earnings. Digi International Inc. (Nasdaq:DGII) shares are slumping more than 19% after the Minnetonka, Minn.-based company reported early Tuesday that its second-quarter revenue totaled $43.1 million, which fell short of Wall Street’s expectation of $51.1 million.

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