Companies usually see a bump in their share price when included on a stock index. That didn't happen this time.According to data compiled by S&P Global Market Intelligence, Nano Nuclear Energy's (NNE -2.79%) share price had eroded by almost 11% week to date as of Thursday night. This, despite the fact that the company was included on several stock indexes managed by a well-known indexer.Come and joinBefore market open that day, Nano announced that its stock is now a component of not one, not two, but three ...