(For a Reuters live blog on U.S., UK and European stock markets, click LIVE/ or type LIVE/ in a news window.) * Twitter plunges on dull second-quarter outlook * Chevron down as profit drops on weaker refining margins * U.S. consumer spending rebounds in March (Updates with market close) April 30 (Reuters) - Wall Street ended lower on Friday, with Apple, Alphabet and other tech-related companies weighing on the S&P 500 and Nasdaq despite recent strong quarterly earnings reports. A day after the S&P 500 closed at a record high, Apple , Google-parent Alphabet and Facebook each gave back gains following upbeat quarterly reports this week. Amazon.com Inc was almost unchanged after it posted record profit late on Thursday and signaled that consumers would keep spending in a growing U.S. economy. Amazon had been up over 2% earlier in the session. Twitter Inc plunged after it offered a tepid revenue forecast for the second quarter, saying user growth could slow as the boost seen during the pandemic fizzles. While megacap favorites posted largely strong earnings in the first quarter, their shares have struggled to maintain the upward trajectory that many had coming into reporting season. “There is a sense that maybe next quarter is as good as it’s going to get, and we’re going to roll over, particularly among the Nasdaq stocks and Big Tech stocks that benefited from the pandemic,” said Jack Ablin, chief investment officer at Cresset Wealth Advisors in Palm Beach, Florida. Most of the 11 major S&P 500 sector indexes fell, with technology, materials and energy among the deepest decliners. Of the 303 companies in the S&P 500 that have reported so far, 87% have topped analysts’ earnings estimates, with Refinitiv IBES data now predicting a 46% jump in profit growth. Data on Friday showed U.S. consumer spending rebounded in March amid a surge in income as households received additional COVID-19 pandemic relief money from the government. Despite Friday’s weakness, the Nasdaq completed its sixth consecutive month of gains. The Dow Jones Industrial Average has now shown monthly gains for the past three months. Unofficially, the Dow Jones Industrial Average fell 0.53% to end at 33,879 points, while the S&P 500 lost 0.72% to 4,181.21. The Nasdaq Composite dropped 0.85%, to 13,962.68. Chevron Corp dropped after its first-quarter profit fell 29%, hit by weaker refining margins and production losses. AbbVie Inc rose after it reported strong results and raised its 2021 earnings forecast, helped by demand for its rheumatoid arthritis drug in the United States. (Reporting by Shivani Kumaresan and Shreyashi Sanyal in Bengaluru, and by Noel Randewich in Oakland, Calif.; Editing by Marguerita Choy)