I created a notebook to illustrate a problem showing symbol names. CHV and CVX refer to the same underlying security. CHV changed its ticker to CVX some time ago. The problem is this: when I access data for CVX or CHV, I don't see a way to get the current ticker for the symbol. Is there a way I can get from c as defined in the notebook below to CVX? I'd like to be able to log the current ticker for symbols when backtesting rather than the outdated ticker that I currently get.

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