Wall Street ended Wednesday mixed amid profit warnings and an announcement from Boeing that it would push back delivery of its new 787 model by six months. The Dow Jones and the Standard & Poor's 500 index closed on new highs Tuesday after enthusiastic responses to the minutes from the last Federal Reserve meeting. But the mixed corporate news dampened the mood, with falls by Dow components Boeing and Alcoa, among others, hurting the 30-stock index. Boeing said Wednesday that a variety of infrastructure issues meant they would push back delivery dates from next May to the fall of 2008. According to preliminary calculations, the Dow fell 85.84, or 0.61 percent, to 14,078.69 after rising 120 points on Tuesday. Broader stock indicators were mixed. The S&P 500 fell 2.68, or 0.17 percent, to 1,562.47, and the technology-heavy Nasdaq composite index rose 7.70, or 0.27 percent, to 2,811.61. The Russell 2000 fell by 0.53 to close at 845.19, while the New York Stock Exchange composite ended down 15.81 to 10,264.50. The American Exchange composite rose by 8.99 or 0.37% to end at 2,425.86. The price of a barrel of light, sweet crude oil for November delivery rose $1.04 to close at $80.26.