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Guggenheim Frontier Markets ETF (the Fund), formerly Claymore/BNY Mellon Frontier Markets ETF, seeks investment results that correspond generally to the performance of an equity index called Bank of New York Mellon New Frontier DR Index (the Frontier Index). The Fund will invest at least 80% of its total assets in American depositary receipts (ADRs) and global depositary receipts (GDRs) that consists of the Index or in the stocks underlying such ADRs and GDRs. The Fund also will invest at least 80% of its total assets in securities of issuers from Frontier Market countries. The Frontier Index tracks the performance of depositary receipts, in ADR or GDR form, that trade on the London Stock Exchange (LSE), New York Stock Exchange (NYSE), NYSE Arca, Inc. (NYSE Arca), NYSE AMEX, and Nasdaq Stock Market (NASDAQ) of companies from countries that are defined as the Frontier Market. Guggenheim Funds Investment Advisors, LLC is the investment adviser of the Fund.

Gran Tierra Energy Inc., together with its subsidiaries, engages in the exploration and production of oil and gas properties in Colombia and Ecuador. The company was founded in 2003 and is headquartered in Calgary, Canada.

ION Geophysical Corporation provides data-driven decision-making to offshore energy, and ports, and defense industries worldwide. The company operates through two segments, E&P Technology & Services and Operations Optimization. The E&P Technology & Services segment creates digital data assets and delivers services to help E&P companies improve decision-making and reduce risk. This segment includes two synergistic groups, imaging and reservoir services, and ventures. The company's Imaging and Reservoir Services group provides data processing, imaging, and reservoir services that improve image quality and subsurface insights, helping E&P companies reduce exploration and production risk, evaluate and develop reservoirs, and increase production. Its Imaging and Reservoir Services group develops and applies proprietary processing algorithms through its imaging engine to data owned or licensed by its customers to translate raw data into subsurface images. The Operations Optimization segment develops mission-critical subscription offerings and provides engineering services that enable operational control and optimization offshore. This segment includes the company's Optimization Software & Services and Devices offerings. The company's Optimization Software & Services group provides survey design, command, and control software systems and related services for marine towed streamer and seabed operations. Its Devices offerings group develops intelligent equipment controlled by its software to optimize operations. The company sells its services and products through a direct sales force consisting of employees and international third-party sales representatives. ION Geophysical Corporation was formerly known as Input/Output, Inc. and changed its name to ION Geophysical Corporation in 2007. The company was founded in 1968 and is headquartered in Houston, Texas. On April 12, 2022, ION Geophysical Corporation along with its affiliates, filed a voluntary petition for reorganization under Chapter 11 in the U.S. Bankruptcy Court for the Southern District of Texas.