Perbedaan kinerja reksa dana konvensional dan syariah pendekatan indeks Sharpe, Treynor, Jensen, Appraisal Ratio M2 measure dan T2 measure (periode Januari 2012 sampai dengan April 2015) = Performance differences between conventional and islamic mutual funds with Sharpe, Treynor, Jensen index appraisal ratio M2 measure and T2 measure approach from January 2012 until April 2015 period