CORRECTED-DEALTALK-As ETF M&A heats up, industry wonders who is next By: Reuters: Company News October 23, 2014 at 15:31 PM EDT (Corrects that there is $21 billion tracking all of Alerian's indices, not just the MLP index, in second last paragraph.) Read More >> Related Stocks: Asia Local Debt ETF Wisdomtree BlackRock Charles Schwab Goldman Sachs Group Wisdomtree Investments Inc