The two new ETFs launched this year that earn an overweight ranking by S&P are Vanguard Total International Stock Index Fund (NYSEArca: VXUS) and PowerShares S&P 500 Low Volatility Portfolio (NYSEArca: SPLV).

The Vanguard fund is “helped by its low 0.20% expense ratio and ownership of numerous stocks viewed as undervalued,” Rosenbluth said. Meanwhile, the PowerShares ETF focuses on less risky stocks within a broader index. [ETF Spotlight: PowerShares S&P 500 Low Volatility]

S&P notes that successful product launches this year in terms of gathering assets include WisdomTree Asia Local Debt Fund (NYSEArca: ALD), PowerShares Senior Loan Portfolio (NYSEArca: BKLN), Schwab U.S. REIT ETF (NYSEArca: SCHH), iShares High Dividend Equity Fund (NYSEArca: HDV) and Schwab U.S. Mid-Cap ETF (NYSEArca: SCHM).

Tisha Guerrero contributed to this article.