The Lyxor S&P MidCap 400 UCITS ETF is a UCITS compliant exchange traded fund that aims to track the benchmark index S&P 400 Net TR. The S&P MidCap 400 Net Total Return Index is weighted by free-float market capitalisation, and is designed to replicate the performance of stocks in the Mid Cap segment of the US market on a total return basis. The index consists of about 400 constituents and covers about 7.75% of the free-float market capitalisation in the USA.