As Director of Research at Portfolio123 and Research Consultant at Chaikin analytics , I have long specialized in rules/factor-based equity investing strategies. While I understand quant investing, including factors and what not, I don't agree with what they do. Rather than be obsessed with statistical studies that are no good for any time periods other than the ones studies, I combine factor work with the underlying theories of finance that tell us why they work or don't work You can follow me on Twitter at @MHGerstein or at my new blog: ActiQuant.com In addition, I formerly managed a high-yield fixed-income fund and conducted research involving quantitative asset allocation strategies such as are at the foundation of what today has come to be known as Robo Advising. I formerly edited the the Forbes Low Priced Stock Report, and served as an assistant research director at Value Line. I have long had a passion for investor education, which has resulted in my having conducted numerous seminars on stock selection and analysis, and the authoring of two books: Screening The Market and The Value Connection.