The Nasdaq Composite, down about 1% on Monday, has lost about 30% over the past 12 months. That's rare—but it doesn’t necessarily mean the bottom is in. In fact, it may suggest the opposite. + There have been only four periods since the Nasdaq’s launch in 1971 when the index has been down 30% or more over the previous 12 months, according to research firm DataTrek. + In three of those four instances, the bottom didn’t arrive until the index had fallen 50% or more. From January 1973 through OctobClick Here To Get Funded!