David Zeiler: Assuming the Dow Jones Industrial Average (NYSEARCA:DIA) represents the biggest, most influential companies in America, Apple Inc. (NASDAQ:AAPL) easily qualifies. Read more…

NYSE:DIA, QQQ

David Zeiler: Apple Inc. (NASDAQ:AAPL) investors have cringed as the stock slipped about 16% from its peak over the last two months. Read more…

QID, QLD, QQQ