Incredibly, four of the Dow 30 have lost more than 10 percent of their value already this year. They include:
- General Electric, down 17.2 percent
- Procter & Gamble, down 12.7 percent
- American Express, down 11.0 percent
- Chevron, down 10.3 percent
But all of those look better than the biggest loser in the S&P. Chesapeake Energy has lost more than a quarter of its value - declining 28.8 percent - since the beginning of the year.