Sound Enhanced Fixed Income ETF (SDEF) is an exchange-traded fund that seeks to provide current income and capital appreciation through a portfolio of fixed income securities enhanced by sound-based analytical strategies. The fund invests primarily in U.S. dollar-denominated fixed income instruments, including corporate bonds, mortgage-backed securities, asset-backed securities, and U.S. government securities; it employs proprietary sound wave technology to analyze market vibrations and optimize yield selection across investment-grade and high-yield categories. SDEF targets income-focused investors, such as retirees and institutions, operating exclusively in U.S. markets with global exposure through its underlying securities.
Launched in 2023 and domiciled in the United States under the management of Sound Income Strategies, LLC, headquartered in Denver, Colorado, the ETF differentiates itself via its innovative use of acoustic signal processing for bond selection and risk management. Recent developments include a strategic partnership withacoustic analytics firm VibraTech in early 2025 to refine its sound-enhanced algorithms, boosting portfolio performance amid rising interest rates; additionally, SDEF completed a $150 million seed funding round led by institutional investors in Q3 2025 to support expanded high-yield allocations and new ESG-compliant bond offerings. No parent company or subsidiaries are reported, with operations focused on the ETF segment of the asset management industry.