The streak continues into its fifth day.
Apple's surge in stock value could be partly attributed to the anticipated launch of a new iPhone. (Creative Commons)
Apple's market value of $623 billion is the highest ever for a U.S. public company.
All three U.S. stock indexes closed the first half of 2012 up 5 percent. (Creative Commons)
All three stock indexes finished the first half of 2012 up more than 5 percent.
The Dow Jones has dropped nearly 6% since Tuesday, the worst two-day fall since November 2008.