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Why Big Stock Swings Like Medpace's 55% Jump Usually Have Clear Causes--Not Market Madness

Understanding the real drivers behind dramatic stock swings can help investors avoid costly mistakes and spot opportunities hidden beneath the headlines.

By Motley Fool YouTube Feb 16, 2026 at 1:30PM EST

Key Points

  • Large, sudden stock price swings—like Medpace’s recent spike and drop—are often driven by identifiable factors such as short squeezes or concentrated trading, not pure randomness.
  • Investors should distinguish between moves based on verifiable corporate developments and those fueled by momentum or retail trading, as each carries different risks and implications for long-term value.

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