Quantitative Approaches to Investing

2010/07 CFA interview w/ Jim Rogers:
http://www.cfapubs.org/doi/pdf/10.2469/cp.v27.n4.6

Speece: What do you think about quantitative approaches?

Rogers: I believe people tend to measure what they can see. Quantitative measurements are often misused. It is somewhat like going to a doctor because you have a terrible headache, but the doctor only has equipment to examine your feet. So, the doctor examines your feet thoroughly and gives you a diagnosis but still has not addressed the cause of your headache. Investment analysts use their quantitative tools in a similar way. Far too often, the results have nothing to do with the success of your portfolio.
Quotes from people about what it's like to be a quant:
viewtopic.php?f=3&t=282&p=412#p412