The Global X Brazil Financials ETF (NYSEArca: BRAF) rose 17.6% in September. [Bank on Brazilian Banks With This Small ETF]

Brazil-related ETFs have a large stake in the financial sector, and investors can target Brazilian financial stocks directly with BRAF.

Brazilian lenders have been struggling due to the slowing economy, decline in interest rates and increased competition between private-sector and state-run lenders.

The Global X Lithium ETF (NYSEArca: LIT) increased 17.0% In September.

New ion batteries from smartphones to electric cars has bolstered demand for rare earth metals like lithium. If Tesla Motors (NasdaqGS: TSLA) is any indication, the trend will likely continue.

According to a Global X note, automotive and industrial applications of lithium batteries made up 36% of the total lithium batteries market, and demand for lithium from these sectors is expected to expand at annualized rates of 37% and 18%, respectively, from 2012 to 2016.

For more information on sector picks, visit our sector ETFs category.

Max Chen contributed to this article.