By Kristina Peterson U.S. stocks opened lower on Tuesday as concerns about Greece's fiscal stability returned and telecommunications and technology stocks took a hit after an executive voiced concern about potential regulations. The Dow Jones Industrial Average (DJI) slid 42 points, or 0.4%, to 10933 in early trading. The measure's technology components were among its worst performers, with Intel (INTC) down 1%, Microsoft (MSFT) off 0.7%, and Hewlett-Packard (HPQ) down 0.7%. Verizon Communications (VZ) also weakened, dropping 0.8% after its chief executive Ivan Seidenberg said he is concerned the proposed National Broadband Plan could lead to an "overreach" of regulation that could cut into private investment. Helping to offset some of the slide, Bank of America (BAC) climbed 0.6%. The Nasdaq Composite (RIXF) fell 0.4%, while the Standard & Poor's 500-share index (SPX) declined 0.3%, with all of its sectors except for financials in the red. Tuesday's drops cut into gains from the previous session. On Monday, the Dow surged to an intraday high of 10988.06, nearly brushing the 11,000 level it has not closed above since Sept. 26, 2008. Yields on the benchmark 10-year Treasury notes reached 4% for the first time since June, as investors seized on strengthening jobs and housing data to bet on an economic recovery. But investors started to worry again on Tuesday over when the U.S. Federal Reserve will hike interest rates from their ultra-low levels. At 2 p.m. Eastern, the Fed will release minutes from the March 16 meeting with attention on the discussion of the phrase "extended period" with respect to the low interest rates. The dollar strengthened against the euro, but slipped against the Japanese yen. Treasurys rose, with the 10-year note up 11/32 to yield 3.947%. Crude-oil prices climbed to approach $87 a barrel and gold futures also advanced. European stocks weakened following a four-day Easter break as traders reacted to reports that Greece wants to exclude participation by the International Monetary Fund in the financial-aid package put together by the European Union last month so that it isn't forced to adopt the onerous austerity measures that are likely to accompany any IMF funding. The report was denied by a senior Greek official, speaking on the condition of anonymity, but that failed to allay investors' fears. Among stocks in focus, Massey Energy (MEE) dropped 8.8% after an explosion at a West Virginia coal mine it operates killed at least 25 miners. Peabody Energy (BTU) raised its bid for MacArthur Coal to 3.6 billion Australian dollars ($3.3 billion) as Noble Group bid for Gloucester Coal, which had earlier agreed to be bought by MacArthur. Peabody gained 1.4% in early trades. AutoNation (AN) rose 3.4% after increasing its forecast for profitability in the first quarter, saying it now expects to earn 32 cents to 35 cents a share for the quarter ended March 31, up from the forecast of 29 cents to 32 cents it gave last month. Overseas, Asian stocks advanced as Australian equities climbed following a quarter-point rate hike from the Reserve Bank of Australia.