Tradr 1X Short Innovation Daily ETF (SARK) is an actively managed exchange-traded fund that seeks the inverse (-1x) daily performance, before fees and expenses, of the ARK Innovation ETF (ARKK); the fund achieves this objective through swap agreements with major global financial institutions and may invest in investment-grade debt securities as collateral. Originally launched on November 5, 2021, by Tuttle Capital Management as the Tuttle Capital Short Innovation ETF, SARK underwent a reorganization in August 2022 under AXS Investments LLC, which serves as investment adviser; AXS Investments is headquartered in Port Chester, New York, and in May 2024 rebranded and launched its suite of leveraged and inverse ETFs under the Tradr ETFs brand. Tradr ETFs, managed by AXS Investments as part of Investment Managers Series Trust II, primarily targets sophisticated traders and professional investors seeking short-term tools to hedge or express high-conviction views on downside risks in disruptive innovation themes; the fund operates in the United States and lists on Nasdaq.
In July 2024, Tradr ETFs increased the inverse leverage factor for SARK from -2x to -1x, reflecting a strategic adjustment to its product offerings amid growing demand for varied leverage multiples, with the change taking effect following SEC approval. AXS Investments further expanded the Tradr lineup in 2025 with new leveraged single-stock ETFs, including first-to-market products on stocks such as CLSK, CRDO, ENPH, GS, U, LAM Research, and MongoDB, alongside surpassing $2 billion in assets under management for the Tradr ETFs platform by October 2025. These developments build on AXS's 2022 acquisition of Tuttle Capital Management's ETF suite, including SARK, which bolstered its position in alternative strategies and leveraged products for active portfolio management. The fund emphasizes daily reset mechanics, making it unsuitable for buy-and-hold strategies due to compounding effects and heightened volatility risks.