WisdomTree Bloomberg U.S. Dollar Bullish Fund (USDU) is an actively managed exchange-traded fund that seeks total returns, before expenses, exceeding the Bloomberg Dollar Total Return Index by providing exposure to the U.S. dollar against a basket of developed and emerging market currencies; it invests primarily in short-term U.S. Treasury bills, high-quality money market securities, cash equivalents, and short-term currency forward contracts. The fund offers investors a dynamic, broad-based vehicle for capitalizing on U.S. dollar appreciation relative to major trading partners, with portfolio characteristics including an effective duration of 0.19 years, average yield to maturity around 3.98%, and embedded income yield of 3.98% as of mid-2025, alongside asset allocations heavily weighted toward Treasuries (approximately 92%), cash (4%), exchange-traded funds (4%), and forwards (0.4%). USDU targets institutional and retail investors seeking currency diversification, negative correlation to international equities and bonds, or hedging against foreign exchange risks in global portfolios, with operations conducted globally through its currency basket and traded on NYSE Arca. Launched on December 18, 2013, the fund is issued and managed by WisdomTree Investments, Inc., headquartered in New York. Recent developments include a quarterly index rebalance announcement and ongoing monthly portfolio adjustments to reflect liquidity and trade-based currency weights, with total assets under management reaching approximately $161 million as of late 2025 and a recent ex-dividend payment of $1.0985 per share on December 26, 2024; no major acquisitions, partnerships, or structural changes have been reported in the past 1-2 years, maintaining its core strategy amid fluctuating dollar performance.