(Reuters) - Assets in actively managed exchange-traded funds (ETFs) worldwide hit a record $1 trillion at the end of August, according to data provider ETFGI, boosted by easier regulations and a wave of product innovation.

Active ETFs seek to outperform the indexes they are benchmarked to, including the S&P 500, the Nasdaq 100 and the Russell 1000 Growth Index. Bear Stearns launched the first active ETF in 2008.