| From Indexuniverse: Exchange-traded funds continued to grow in prominence as part of the overall U.S. equities market in September, reaching 35% of all trading, up from the previous record level of 31%, just reached in August, according to National Stock Exchange data.
The biggest part of that trading story has been State Street Global Advisors' SPDRs family of ETFs, which for the month of September represented approximately 50% of all ETF trading volume, with close to $1.4 trillion of the nearly $2.8 trillion in ETF trading volume. Year-to-date, the SPDRs also represent approximately 50% of ETF trading volume ($8.8 trillion), with Barclays Global Investors' iShares family a distant second at $3.75 trillion. .... Full Article: Source
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