Zillow Group is trading at $33.73, up 10.36%, amid broad market strength; no verified company-specific catalyst has emerged so far. - The S&P 500, Nasdaq Composite, and Dow Jones are all up more than 1.5%, supporting a likely market-wide explanation. - Zillow Group’s third-quarter results are scheduled after the market close on November 4. - A morning analyst valuation update was cautious, not a clear explanation for the rise.