BlackRock made a big splash in the exchange-traded funds business this summer with its $13.5 billion purchase of the investment unit of Barclays Global Investors, and analysts and executives are waiting for the next shoe to drop.

"The $64,000 question is, who will be the next large entrant into the space," said Geoffrey Bobroff, the president of Bobroff Consulting in East Greenwich, R.I.

Subscribe Now

Access to premium content including in-depth coverage of mutual funds, hedge funds, 401(K)s, 529 plans, and more.

3-Week Free Trial

Insight and analysis into the management, marketing, operations and technology of the asset management industry.