by Youssef El Beqqal · · Updated
Why Portfolio Value Isn't the Full Picture
TL;DR
Portfolio value blends contributions with market performance into a single number, so an illustrative example (a $200 contribution plus 3% market growth on $10,000) shows why the same total gain can't be attributed to either one without tracking them separately.
Watching a portfolio balance go up feels like progress. Some of that gain is genuinely earned, the money actually put in, and some of it is the market doing whatever the market happened to do that month.
An example of how the two get blended
As an illustrative example: a portfolio starts the month at $10,000. $200 gets contributed, and the market moves up 3% on the existing balance.
How a $506 monthly gain breaks down
$10,000
Starting balance
+ $200
New contribution
+ $306
Market growth (3% on $10,000)
$10,506
Month-end total
Looking only at that $506 increase, there's no way to tell from the single number how much came from the habit of contributing versus how much came from the market.
Why that distinction matters for judging progress
If only total portfolio value gets watched, a strong market month can make it look like real progress happened even with zero contributions, and a rough market month can make consistent contributions look like a failure. Neither read is accurate, because one number is measuring two different things at once.
Separating the two
Contributions are the number actually controlled: how consistently money is going in. Market performance is the number that isn't controlled, and moves independently of any habit.
Tracking them separately shows whether the habit itself is working, independent of what the market did around it. That distinction also answers how often it's worth checking in on investments at all: contributions are worth reviewing monthly, market swings usually aren't worth reacting to.
MoneyFlow tracks contributions and portfolio value as two distinct numbers, so consistency stays visible instead of buried inside market swings.
