As the ETF industry has exploded in recent years, observers have had some very different takes on the pace and nature of the expansion in the product lineup. Some have cheered every first-to-market product, noting that the current offerings have only scratched the surface of what the ETF industry can offer. Others have pointed to the top-heavy nature of the industry–the 20 biggest funds account for nearly half of all assets–and surplus of small, aging products as evidence that the industry’s expansion got a bit ahead of itself. The last few months have shown that there is some truth to both of these takes on the state of the ETF industry. Multiple issuers have pulled the plug on ETFs that have failed to gain traction in recent months, giving up on products that for one reason or another never really caught on with investors. Many of the now defunct product offerings [...] Click here to read the original article on ETFdb.com. Related Stories: ETF Industry Roundup: More New Fund Ideas October ETF Roundup: Launches, Filings, and Closures ETF Ideas For A Flat Market