Home to over $1.27 billion in assets under management, the SPDR DoubleLine Total Return Tactical ETF (NYSEArca: TOTL) is easily the most successful new exchange traded fund to debut this year.

TOTL, managed by bond guru Jeff Gundlach, can also lay claim to be one of the most successful actively managed ETFs and one of the fastest-growing funds in that segment of the ETF market. With superlatives like that behind TOTL, there is no shame any new ETF in being labeled “second-best.”

That label applies to the iShares Exponential Technologies ETF (NYSEArca: XT). A partnership between BlackRock’s (NYSE: BLK) iShares unit, the world’s largest issuer of exchange traded funds, and Ric Edelman’s Edelman Financial Services, one of the largest independent registered investment advisory firms, fostered XT’s launch.

Like TOTL, XT has been an undisputed success, having attracted nearly $650 million in assets since coming to market in March. [A new Exponential Tech ETF]

“The equal-weighted ETF invests across sectors in developed and emerging markets. It offers exposure to companies driving innovation by developing and/or leveraging promising technologies,” reports Investor’s Business Daily.