US STOCKS-Apple and interest rate jitters weigh on Wall Street
* AIG, Allstate fall a day after results
* Lockhart points to September rate hike
* Walt Disney, Genworth to report after the bell
* Indexes down: Dow 0.51 pct, S&P 0.43 pct, Nasdaq 0.41 pct (Updates to afternoon)
By Noel Randewich
Aug 4 (Reuters) - Wall Street extended losses on Tuesday as investors worried about a rise in interest rates while Apple's shares hit their lowest in over six months.
The iPhone maker's shares fell as much as 4.4 percent to $113.25, slipping firmly below their 200-day daily moving average, a key technical level closely watched by traders. The stock was the biggest drag on the three major U.S. indexes.
While there was no clear trigger for Apple's selloff, traders said worries over a slowdown in China and skepticism over demand for iPhones were contributing to pressure.
"Apple has been the weak sister in the market today. That's having an outsized impact. But if you look at the sectors, most everything is down with the exception of materials," said Alan Gayle, senior investment strategist and director of asset allocation at RidgeWorth Investments in Atlanta, Georgia. Continuación...