The first half of 2010 is in the books, and it is no surprise that the ETF industry has continued to grow at an impressive rate. According to the latest data from the National Stock Exchange, the universe of exchange-traded products saw almost $40 billion of cash inflows during the first six months of the year. From purely a volume perspective, the expansion of the ETF industry has been impressive as well; by our count, the first half saw more than 100 new product launches covering a wide variety of asset classes and investment strategies. Of course some of these new products have been more successful than others; most ETFs take a significant amount of time to build up material asset levels and trading volumes. But others come flying out of the gates, tapping into a corner of the investable universe that investors are eager to tap but that wasn’t [...] Click here to read the original article on ETFdb.com. Related Stories: Ten Most Successful New ETFs Of 2009 Six ETF Stories From The First Six Months Of 2010 May ETF Stats: Hot Streak Continues