Updated from 4:05 p.m. EDTThe losing streak in housing, energy and technology shares entered its second week Monday, and the broader averages fell in holiday-lightened trading. The Nasdaq lost 11.43 points, or 0.55%, to 2078.92, pressured by a 3% decline in the Philadelphia Semiconductor Sector Index. The S&P 500 lost 8.57 points, or 0.72%, to 1187.33, while the Dow Jones Industrial Average was lower by 53.55 points, or 0.52%, at 10,238.76. "Earnings warnings had stocks taking it pretty hard today," said Peter Cardillo, chief market analyst with S.W. Bach & Co. "We have not only inflation fears but now we have earnings jitters. We tried to stabilize today, but we're going to have to wait for the next few days." About 1.63 billion shares traded on the New York Stock Exchange, with decliners beating advancers by a 12-to-5 margin. Trading volume on the Nasdaq was 1.41 billion shares, with decliners outpacing advancers 2 to 1. Tech stocks fell after Xilinx ( XLNX) warned that second-quarter sales will be down 1% to 2%, compared with its previous forecast of a 4% rise. Analysts expected Xilinx's sales to rise 2% to $415.3 million, according to Thomson First Call. The stock tumbled $4.35, or 16%, to $22.77. Other chip stocks showing weakness included Freescale Semiconductor ( FSL) and National Semiconductor ( NSM). All 19 components of the Philadelphia Semiconductor Sector Index finished in the red. "We've seen some weakness in the semiconductors over the last couple weeks," said Paul Nolte, director of investments with Hinsdale Associates. "Revisions have been lower, and bookings have been lower as well." Bond traders had the session off Monday for Columbus Day. The dollar was higher against the yen and euro. Front-month oil, which lost almost 7% last week on evidence of moderating worldwide energy demand, drifted lower again. Crude for November delivery finished down 4 cents to $61.80 a barrel, rebounding from a session low of $60.40. Unleaded gasoline was down 3 cents at $1.80 a gallon. Homebuilding shares fell, with the Philadelphia Housing Sector index closing down 2.6%. The index was pressured by declines of 4% or more in Toll Brothers ( TOL), Hovnanian ( HOV), Lennar ( LEN), Beazer Homes ( BZH) and Standard Pacific ( SPF). "This is a fallout from housing numbers data over the last few weeks," added Nolte. "Higher interest rates and higher oil prices are finally taking their bite. This sector may cool in the months ahead." In mergers news, insurance giant Lincoln National ( LNC) agreed to acquire Jefferson-Pilot ( JP) for stock and cash worth $7.5 billion, or $55.96 a share. The price is 9% above Jefferson-Pilot's Friday close. Lincoln National lost 3% to $49.19, while Jefferson-Pilot gained 6% to $53.81. Another top story surrounded a major bankruptcy filing this past weekend that had been the subject of torrid speculation by professional money managers. Delphi Corp. ( DPH), the biggest U.S. auto-parts supplier, sought Chapter 11 protection in New York after months of efforts to refinance or reduce more than $22 billion in debt.