Is State Street SPDR S&P 400 US Mid Cap UCITS ETF Halal?

SPY4.L was created on 2012-01-30 by SPDR. The fund's investment portfolio concentrates primarily on mid cap equity. The objective of the Fund is to track the equity market performance of mid-sized U.S. companies. The Fund seeks to track the performance of the S&P MidCap 400 Index (the Index) as closely as possible. The Fund is an index tracking fund (also known as a passively managed fund).