bt.algos.RunAfterDate can not update bt.backtest.Result ( 'Start', 'CARG' etc )

[pinedance]

I am backtesting some momentum strategies with bt package. As you know, momentum strategies require a longer period of data than the trading period. So I added bt.algos.RunAfterDate to my strategies.

I expected bt.backtest.Result should be chaged when bt.algos.RunAfterDate was added. But Start date of Result was still first date of the data. I doubt the accuracy of the CAGR value. Because CAGR is mostly affected by the trading period.

I hope this part will be fixed.

# Pseudocode
# When first date of the data is 2000-01-01 ...
my_strategy = [
    ...
    bt.algos.RunAfterDate("2001-01-01")
    ...
]

# Result of my backtest
Stat     my_strategy
-----    --------------
Start    2000-01-01       # not 2001-01-01
...
CAGR     7.25             # derived based on data period or trading period?