Halftime Trader: Buy stocks for magic $100 club

The IBM 7950 Harvest cryptanalysis computer, used by the NSA from 1962-1976.
Landon Dowdy | CNBC
The IBM 7950 Harvest cryptanalysis computer, used by the NSA from 1962-1976.

A new year means a new strategy for one trader hoping for better returns in the Halftime Portfolio—a stock picking challenge between six of the CNBC show's regular contributors.

"What I learned from last year's competition is that I started too conservative. Then I tried to get aggressive at the end of the year—it didn't work," said Josh Brown of Ritholtz Wealth Management.

Brown followed a bottom-up, actively-managed approach in 2014, making seven trades, but ultimately ending with a 14 percent loss in his portfolio.

So in 2015, this trader is taking a page out of the quants' book.