Small Cap Blend and Large Cap Growth ETFs recorded the biggest inflows.

Vanguard's move was seen by analysts as a potential game-changer for the U.S. actively managed funds industry that would increase competition and push down costs.

The delay was because of a timing issue.

ETF buyers are building their holdings, joining hedge funds that have boosted their net-long position in bullion futures by almost nine-fold since early July.

The S&P 500 Financial Index fell 2.2 percent on Tuesday, the most since May, compared with a 0.8 percent decline in the full index, the widest gap in five months.

Mark Yusko is building an actively managed ETF in partnership with Advisor Shares.

Northern Trust's FlexShares pioneered multifactor ETFs with the U.S. Market Tilt Index Fund in 2011. FlexShares' Shundrawn Thomas on the appeal of multifactor strategies, and the risks.

Who wins when gold rallies?

There's a distinction between funds that select small-cap stocks and those that take size into account.

RIAS are allocating client assets differently from those at the wirehouses or independent broker/dealers.