FYI: ETFs are famous for their tax efficiency. This advantage, along with low operating costs, transparency, and the benefits of passive investing, is catapulting ETF assets to new heights, as mutual funds lose clients.
Yet the trading activities around ETF portfolio rebalances are not free. In fact, this is one area where ETF transparency can bring additional costs.
Regards,
Ted
http://www.etf.com/sections/features-and-news/players-behind-etf-tax-efficiency?nopaging=1