About Us
REX Financial is a leading provider of innovative exchange-traded products (ETPs), specializing in alternative strategy ETFs and ETNs. Known for pioneering the MicroSectors™ and T-REX product lines, REX offers leveraged and inverse exposure to a wide range of market sectors. The firm also supports its crypto-focused sister company, Osprey Funds, LLC, and has launched multiple ETFs with Osprey under the REX-Osprey™ name. In addition, REX has recently introduced a series of option-based income strategies. Through its expanding suite of ETPs, REX continues to drive industry innovation, serving investors seeking sophisticated trading tools, income solutions, and alternative exposures.
OUR TEAM
Greg King
CEO and Founder
Greg is the founder and CEO of REX Financial. He is the creator of several industry innovations, including filing a patent for the first ETN in 2006, launching the first-ever VIX-linked products in 2009 (VXX), and launching the first crypto staking ETF in the US (SSK) in 2025. During his career he has listed over 200 exchange traded products on the NYSE, Nasdaq, and CBOE and has held senior roles with Barclays, Credit Suisse, and Global X Funds. Greg is also the Founder & CEO of Osprey Funds, REX’s sister company, and previously founded and sold VelocityShares™ to Janus Henderson. He has an M.B.A. from University of California, Davis and is a CFA Charterholder.
Kevin Gopaul
CIO, President REX Financial Canada
Kevin Gopaul was the key architect and driving force behind BMO Global Asset Management’s $100B ETF franchise from 2009 to 2023. During his time at BMO, Kevin also held the position of Canadian CEO, Chief Investment Officer and Global Head of Quantitative Investments – managing teams in Toronto, Hong Kong, London and Chicago. Kevin’s 25 year career has spanned research, trading, portfolio management and executive roles at top organizations such as Barclays Global Investors, Sun Life Financial and Scotia Capital. Kevin studied Economics, Finance and Computer Science at the University of Waterloo, and was recognized as one of Investment Industry Association of Canada’s Top 40 Under 40.
Scott Acheychek
COO
Scott is the Chief Operating Officer of REX Financial, previously serving as CEO of REX Financial subsidiary REX Shares. He joined REX Shares in 2016 upon launch of their first ETFs and has played a key role in overseeing their product expansion and asset growth. Prior to REX Shares, Scott held senior sales and leadership positions at major global investment banks such as Citi, AIG, and Wells Fargo. In these roles, he focused on providing derivative and structure note solutions for hedge funds, asset managers, and financial advisors across various asset classes. Scott has been involved in the launch of over 100 ETNs and ETFs. He holds a B.S. in Mathematics from Sacred Heart University.
Robert Rokose
CFO/CCO
Robert joined REX Financial in 2020 and brings 28 years of accounting and financial services experience. His previous roles include CFO of U.S. Funds at JP Morgan Asset Management, Managing Director & CFO for PIMCO/Allianz Funds and Assistant Vice President & Assistant Controller of publicly held Lexington Global Asset Managers. He has an M.B.A. from University of Connecticut and is a Certified Public Accountant (CPA).
Greg Collett
General Counsel
Greg joined REX Financial in 2024 as General Counsel. He has over 27 years of legal and investment management experience. His previous roles include Director at the World Gold Council, Director & Chief Operating Officer at DB (Deutsche Bank) Commodity Services LLC and Associate at Sidley Austin. He began his career at the Commodity Futures Trading Commission as an Attorney-Adviser. Mr. Collett has an undergraduate degree from Colgate University and received his J.D. from The George Washington School of Law.
Michael Eschmann
Managing Director
Michael joined REX Financial in 2022 as Managing Director of Business Development. He has over 20 years of experience across sales, portfolio management, trading, and capital markets. Prior to joining REX, Michael served as Head of ETF Capital Markets for Oppenheimer Funds. Before that, he was Co-Head of ETF Sales and Capital Markets at Direxion Investments. He holds a B.S. in Finance from Fairfield University.
