BMO S&P US Mid Cap Index ETF seeks to replicate, to the extent possible, the performance of a U.S. equityindex, net of expenses. Currently, BMO S&P Mid Cap Index ETF seeks to replicate the performance of the S&PMidCap 400® Index. The Hedged Units of BMO S&P US Mid Cap Index ETF will also invest in or use derivativeinstruments to seek to hedge U.S. currency exposure.