Multiple credible financial news and market data sources indicate that Stanley Druckenmiller’s Duquesne Family Office purchased a significant stake in the iShares MSCI Brazil Capped ETF (EWZ). Portfolio disclosures and analysis in reputable outlets confirm the transaction occurred in the most recent filing period, which aligns with market data showing that EWZ's price rose approximately 17% soon after the purchase. These reports are consistent, mutually reinforcing, and come from high-authority sources that track institutional trades and ETF performance. The timing connection between his purchase and the subsequent value increase is supported by the chronological market price data, and no contradictory evidence suggests this did not occur. While exact trade dates and percentage gains could vary slightly depending on measurement windows, the core claim—that the stake was acquired before a roughly 17% increase—is strongly supported.