The attached backtest runs with the tickers ["MSFT", "AEP", "CAT"], but if I add "BAC" to the list then it fails with: 

“We were unable to locate the ticker 'BAC'. in SymbolCache.cs:line 54”

This is the entire stack-trace and there is no backtest created to attach to this discussion.

The intention of my code is to get the PE ratio of the selected tickers into ‘fundamentals_dict’ to use in the ‘trade ’function.

What am I doing wrong?

Please help