u/Cynicalbeast

If I wanted to compare an existing Fidelity managed account (IRA) to something similar to a Boglehead approach, is it as easy as looking the the total $ amount in the managed account at closing on a specific day and then on that same evening going to the watch list and adding an entry for FZROX for 55% of the total, FXNAX for 30% of the total, and FZILX for 15% of the total. Then going forward just check my managed account against the total of these 3 watch list entries? Assuming it is in IRA then taxes / tax loss harvesting don't factor in. On day 1 the totals will match exactly, then will diverge (I assume) based on performance of each and fees being charged on the managed account. Am I missing anything?