The exchange traded fund industry may begin to slow down its product expansion after ETF providers filled out the majority of investment styles, beta indexing and niche strategies.

“Barring any movement on active ETFs, I think perhaps we’re closer to the year that the number of ETFs shrinks,” Michael Iachini, managing director of ETF research at Charles Schwab Investment Advisory, said in an Ignites report.

Iachini did not state that there will be fewer ETFs at the end of 2015 than the end of 2014, but he does not think that a diminution sometime in the future is too farfetched.

While the ETF industry was expanding, there were some growing pains along the way.

Launch and liquidation trends “are consistent with a maturing industry,” Bill Belden, head of ETF product development and management at Guggenheim Investments, said in the article. “The pace by which liquidations will continue to increase and there are fewer gaps to fill as product development is concerned.”

As the industry becomes saturated with ETF strategies, the number of losing ideas could increase, with sponsors shuttering unsuccessful products at a greater pace than new fund launches.

For instance, BlackRock (NYSE: BLK), the world’s largest ETF sponsor, launched 29 new ETFs in 2014, the same number of ETFs that iShares closed over the same period. [Some Issuers Get Selective About New ETF Launches]

“You’ll see companies open products and close products if they don’t work, and that’s OK; it’s being thoughtful,” Brian Jacobs, president of Direxion Investments, said in the Ignites article.

There were 1,640 U.S.-listed exchange traded products at the end of 2014, or 134 more year-over-year and almost double the number of products on the markets at the end of 2008, according to BlackRock data.

However, 79 ETPs were closed in 2014, compared to 67 in 2013. Year-to-date, there were 12 new fund launches, but 22 ETPs were already delisted, according to XTF data.

According to Ron Rowland’s so-called ETF Deathwatch, there are now over 220 ETFs and 100 exchange traded notes that are at risk of closure due to low assets under management or paltry amount of daily average volume.

Looking ahead, ETF industry experts believe there is more room to expand in the alternative or smart-beta index ETF space, which experienced a significant increase in new launches last year. BlackRock’s iShares, Direxion and Guggenheim Investments, among others, are pushing into the smart-beta index-based ETF space. [Large Waves in the Smart-Beta ETF Space]

For more information on the ETF industry, visit our current affairs category.

Max Chen contributed to this article.