ProShares, the largest U.S. issuer of inverse and leveraged exchange traded funds, continues to expand its lineup of traditional ETFs with today’ launch of the ProShares DJ Brookfield Global Infrastructure ETF (NYSEArca: TOLZ).

The Dow Jones Brookfield Global Infrastructure Composite Index, the underlying index for TOLZ, is comprised of global companies that can be viewed as pure infrastructure firms.  The index is weighted by market capitalization.

To be included in the index, a company must derive 70% of estimated cash flows from airports, toll roads, ports, water, communications or oil and gas storage and transportation, according to S&P Dow Jones Indices.

As of the end of February, 21 countries were represented in the index, including five emerging markets. The U.S. dominates the index at nearly 50% of its weight, according to S&P Dow Jones Indices. The U.K. and Canada combine for another 23%.