Don't expect a 50/50 split. The Washington Commanders' play-caller explains his modern philosophy and why adaptability is his secret weapon.

Discover how the CBOE Volatility Index (VIX) helps investors gauge market risk and fear by measuring the 30-day volatility expectations of the S&P 500 Index.

Discover how pre-market trading works, its benefits, risks, and how it offers early opportunities to react to market news, from 4 a.m. to 9:30 a.m. EST.