NASDAQ Broke 4,000 Today: Here's A Timeline Of Every Time The Index Has Doubled In Value [CHART]

The Nasdaq Composite Index (INDEXNASDAQ:IXIC) today broke the 4,000 mark for the first time since September 2000. Sounds high but it's still well below its peak of 5,048 during the dot-com bubble of the late '90s. It took the index more than 10 years to double from its starting point of 100 points, and just half that time -- a little over five years -- to double again.