New answers tagged backtesting
Given that you're tradeing low volumes ($<1\%$ of volume, I take), I would not assume more than 1 bps slippage in your case.
There are plenty of sites you can get this information from. etfdb.com and etf.com are two of the bigger ones. See this for an example: http://etfdb.com/etfdb-category/europe-equities/ http://etfdb.com/tool/etf-stock-exposure-tool/
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