Summarize and humanize this content to 2000 words in 6 paragraphs in EnglishThe stock market picked up steam as the holiday-shortened week wound down.The S&P 500 was up 0.8%. The Nasdaq Composite was up 0.5%. The Dow was down 300 points, or 0.8%, though UnitedHealth on its own was shaving 843 points off the index.All 11 major S&P 500 sectors were rising, though health care and tech were only up slightly.
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