According to the source, Polymarket has raised $2B at a $9B valuation in a deal involving the NYSE parent company, indicating a major capital event for the prediction market sector (source: user-provided tweet on Oct 8, 2025). For trading desks, the disclosed raise and valuation can act as a near-term sentiment catalyst for prediction-market-related exposures; monitor official disclosures from the NYSE parent and Polymarket for confirmation details and timelines before positioning (source: user-provided tweet on Oct 8, 2025).