The Dow Piano

In a series of all-or-nothing bets, a single loss wipes out the gambler

5 ways to fortify your portfolio for 2015.

The middle of this week saw a volatile trading session, with the S&P 500 finishing up about 40 basis points. And then there was Nvidia doing its usual song and dance with the beat-and-raise routine it trots out every quarter.

Chasing a hot strategy can lead to high expectations, then frustration.