I'm looking to backtest this portfolio: Global Bonds, gold, Global Stocks, short-term t-bills (1/4 each) from 1990 up to this year, rebalanced monthly. Then take a variety of statistics on the time series such as VAR, max drawdown, etc...
1st: I know some python that could potentially handle this but it was suggested to use excel, which I don't know very well. Any links to good resources for the excel skills required would be greatly appreciated.
2nd: These data sets seem to be very tricky, especially the global bond and global stock data going back to 1990. Where could I find this data? If not I was thinking of using a one or two proxies then comparing the results, is this sound reasoning?
Many thanks