Both snapshots show MYR180,000 net worth. The MYR10,000 residual explains a balance change after external flows; it is not an investment return percentage.
Choose the household boundary and one valuation basis
Use two fictional snapshots dated September and October 2026. Base currency is MYR, every asset and liability is recorded in MYR, and each manual FX input is one. September assets are cash MYR30,000, shares MYR50,000 and a home valued at MYR500,000. The mortgage balance is MYR400,000.
Total assets are MYR580,000 and net worth MYR180,000. Cash and shares are marked accessible in this exercise; the home is not. Accessible assets total MYR80,000, which is not the same thing as net worth or guaranteed immediate sale proceeds. Decide which people and accounts belong inside the boundary before comparing dates.
Reconcile the October cash use and debt reduction
October cash is MYR18,000, shares MYR60,000, the home remains MYR500,000 and the mortgage falls to MYR398,000. Assume no share purchases or other valuation changes. Cash fell MYR12,000: MYR10,000 paid consumption and MYR2,000 reduced mortgage principal. That principal payment lowers both cash and debt, leaving net worth unchanged by that transfer alone.
The MYR10,000 consumption is a negative external saving flow for this boundary. Record October flow as negative MYR10,000, not negative MYR12,000. Any interest or other consumption is already inside the stated MYR10,000; adding it again would change the exercise.
Read the flat net worth and the changing liquidity together
October assets total MYR578,000. Subtract MYR398,000 debt to obtain the same MYR180,000 net worth. Shares increased MYR10,000, cash fell MYR12,000 and debt fell MYR2,000: plus ten minus twelve plus two equals zero. Neither snapshot is wrong merely because the portfolio headline rose.
Accessible assets nevertheless fall from MYR80,000 to MYR78,000, and the cash component falls much more sharply than that total. A household can preserve net worth while reducing its ability to meet a near-term bill without selling investments. Look at the composition and obligations rather than using one wealth total as a complete measure of flexibility.
| Household measure, MYR | September 2026 | October 2026 |
|---|---|---|
| Cash / shares | 30,000 / 50,000 | 18,000 / 60,000 |
| Total assets / mortgage | 580,000 / 400,000 | 578,000 / 398,000 |
| Net worth | 180,000 | 180,000 |
| Accessible assets | 80,000 | 78,000 |
| Signed external flow | 0 | -10,000 |
| Residual; not a return | No prior comparison | 10,000 |
Calculate the residual without calling it performance
The comparison calculates residual as net-worth change minus signed external flow. Here that is zero minus negative MYR10,000, giving positive MYR10,000. Under our restrictive assumptions it matches the share revaluation, but the residual field itself does not know the cause. In another household it can include FX moves, property estimates, omitted items or recording errors.
It is not a money-weighted or time-weighted investment return. Those require a defined investment scope and cashflow timing. September flow is zero because it is the starting snapshot in this exercise. Investor.gov’s account-statement material is background for checking records; it does not validate our household arithmetic or convert the residual into performance.
Background source: Investor.gov: understanding account statements (background only)
Remove duplicated assets before trusting a trend
Record either an investment account’s aggregate value or its individual holdings within this snapshot, not both. Likewise, use the full MYR500,000 home and MYR398,000 mortgage, or a consistently defined alternative scope; do not add home equity as a third asset on top of the full home less mortgage. That would count the same interest twice.
For foreign-currency rows, record the original amount and manual base-currency-per-unit FX on each date. A changed exchange rate can move wealth even when units do not change. Preserve dated statements and valuation notes so a surprising residual can be traced instead of automatically celebrated as a gain.
Load both dated snapshots and compare like with like
Open household net worth and inspect the September and October entries. Check asset kinds, accessible flags, liabilities, currencies and October’s negative external flow. Recalculate October against September using the same MYR base. Verify MYR180,000 at both dates, zero change and MYR10,000 residual.
Use the manual CSV as a reconciliation reference, then replace the fictional rows only in a separately protected working copy. Record why an asset estimate or scope changes. This tool does not automatically import account totals from other Numbrite tools, retrieve prices or determine whether an asset can actually be accessed today.
The JSON download is a fictional example book for this tool only. Before importing, export a backup of your existing local book. Read the import preview, check the tool and entries, and confirm only if you intend to replace the current book; importing is not a merge. Keep your backup separately. The companion CSV is a manual comparison worksheet, not an import file. Downloads do not connect to your accounts or sync devices.
Download the example book and manual comparison
Put it into practice
Compare both dates and explain the cash, debt and external-flow movements.
Open the decision tool