Quantitative analysis and strategies .. can anyone shed some light ?

Hi all ,

I've been reading alot about how quantitative analysts seem to be the core of any big investment bank/investment firm and that by using quantitative models we can improve our accuracy rate .
I just want to know what exactly is this ? and what kind of concepts of math are used ?
Can anyone shed some light regarding this plz .

thanking ,

Hedgefudge

Hi,

Please refer Quantitative Trading Systems Practical Methods for Design Testing and Validation by Howard B Bandy.