By Matt Wagner, CFA, Associate Director, Research The dilemma of market concentration is front of mind for asset allocators. At no point in the last 30 years has the S&P 500 Index been so concentrated in just a handful of names. The top 10 holdings account for almost 34% of the index’s weight, roughly double [...] The post A Multifactor Solution for a Top-Heavy Market appeared first on ETF Trends .