Why do some of the Nanotech stocks have such a high price in their chart history?

petron asked:


I am newly into investing in nanotechnology stocks. When I look at their stock value charts some show very high stock prices a few years back. Advanced Nanotech, AVNA shows a value in the thousands back in 2000-2001. Biosantee Pharma, BPA and Arrowhead Research, ARWR also show high values in the past. Does anyone have an idea why this is.

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