Market-weighted indexes may end up over-exposed to expensive investments, and underweight more attractively valued ones. That can be a problem. Of course, there are advantages to the approach too.

Andriy Blokhin has 5+ years of professional experience in public accounting, personal investing, and as a senior auditor with Ernst & Young. Robert Kelly is managing director of XTS Energy LLC, and ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...