It was another dreary day on the markets with red dominating the boards and hangovers remaining from poor news yesterday.The technology hardware and equipment sector was the worst performing sector for the second day in a row. Chipmaker ARM Holdings again took a hit. It is suffering from profit warnings by its sector peers and saw its shares fall almost 4%.Thomas Cook again led the travel and leisure sector lower. Its shares lost another 15% of their value today; this means they are almost half the price they were a week ago. The travel operator issued a profit warning for the third quarter on Tuesday, saying underlying operating profit for the three months ended 30 June likely to be £5m lower than expectations at £20m. Full-year figures are now expected to be below estimates. Top performing sectors so far todayElectronic & Electrical Equipment 3,491.28 +1.06%Industrial Transportation 2,635.43 +0.40%Food Producers & Processors 5,288.16 +0.27%Real Estate Investment Trusts 2,276.37 +0.15%Alternative Energy null 0.00%Bottom performing sectors so far todayTechnology Hardware & Equipment 735.19 -2.18%Travel & Leisure 4,512.83 -1.91%Oil Equipment, Services & Distribution 24,954.90 -1.87%Software & Computer Services 733.68 -1.68%Construction & Materials 3,800.43 -1.63%