By Bret Kenwell Apple stock is working on its eighth straight daily gain. Can it continue lead the Nasdaq higher? Apple (AAPL) – Get Apple Inc. Report stock has been on one impressive run, as shares look to finish higher for the eighth straight trading session. Think about that. At a time where the markets have been badly bruised, Apple stock has almost rallied every day for two weeks. Maybe there’s something to be said for having a robust balance sheet and immense cash flow — something that helped attract Warren Buffett’s Berkshire Hathaway (BRK.A) – Get Berkshire Hathaway Inc. Class A Report…