Global exchange-traded fund assets have increased by 13.9% from $1.35 trillion to $1.54 trillion year-to-date, through the end of July 2012, according to data from ETFGI, a London-based research shop.

The firm also revealed that last month, ETFs saw net inflows of $24 billion and $123 billion year-to-date. Vanguard gathered the largest net ETF inflows YTD with $34.3 billion, followed by iShares with US$30.8 billion and SPDR ETFs with $16 billion in net inflows.

Db x-trackers experienced the largest net ETF outflows in July with $293 milion followed by Commerzbank with $211 million and Daiwa Asset Management with US$154 million net outflows.

Twenty two new ETFs were launched last month by 14 providers on seven exchanges, while three ETFs delisted. All told, 343 new ETFs have been launched by 69 providers on 24 exchanges, while 45 ETFs have delisted through July.

ETFGI is headed by Deborah Fuhr, Shane Kelly and Matthew Murray, who were instrumental in the development of the first ETF global industry research reports and worldwide handbooks while they were at Morgan Stanley, and most recently were responsible for the development and production of ETF reports and handbooks at BlackRock/Barclays Global Investors. The trio founded the firm in February 2012.