RMD (Required Minimum Deduction)

I am over 70.5 YO. I must take a Required Minimum Deduction from my IRA account.

If I simply remove the RMD the performance of the IRA portfolio appears to take a sever hit which is not the case.

How can I show that the actual performance of the portfolio is still doing well even though I’ve taken the RMD and moved it into another taxable investment?

How do I show, in September, that the portfolio performance is still going up even though the actual dollars in the portfolio has gone down?