Summer markets have a tendency to turn stressful come mid-August. Just ask Louis Navellier, founder of Navellier & Associates. "This is why I hate August — we have air pockets and we lose liquidity," ...

Get your circuit breakers ready. Heading into the open, Dow futures are now down 1,203 points, a decline of 2.8%. The other major contracts are worse: the S&P 500 contract is down 3.5%, the Nasdaq 100 ...