Recompute target market values by adding total market value and new funds, showing each asset's theoretical buy or trim amounts.
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Portfolio design · Dynamic rebalance
Asset allocation and dynamic rebalancing
Enter current market value and target weights at the same evaluation time, check deviations, and compare the three rules: full return to target, drift threshold and new‑money‑first. Results are theoretical calculations and do not represent executed trades or suitability for everyone.
Target weightsDrift bandsCash-firstClient‑side
01 · Portfolio input
Current assets and target allocation
Please use the same date, the same currency and the same valuation basis. Target weights must sum to 100%; do not enter fictitious market data; assets with zero value must still retain their target weight.
| Asset name | Current market value | Target weight | Actions |
|---|
Not yet calculated; inputs and results remain only on the current browser page.
02 · Decision rules
Write the rules first, then look at the difference.
Compare current weight and target weight in percentage points; assets not exceeding the threshold are not flagged as must‑trade.
Allocate new funds to underweight gaps first; any remaining shortfall due to insufficient funds remains and is not assumed to be executed.
Formula:
Current weight = Current market value ÷ Current total market value
Target market value = (Current total market value + new funds) × target weight
Theoretical adjustment amount = Target market value − Current market value
Deviation (percentage points) = current weight − target weight
Current weight = Current market value ÷ Current total market value
Target market value = (Current total market value + new funds) × target weight
Theoretical adjustment amount = Target market value − Current market value
Deviation (percentage points) = current weight − target weight
Percentage points are not percentages.Target 60%, current 66% represents a +6 percentage‑point deviation; it is not the same concept as a "relative overweight 10%".
03 · Allocation output
Allocation deviation and theoretical actions
Buy/reduce is a model delta label, not an order; costs and taxes are user-entered pedagogical assumptions.
Current weight and target weight
Current weightTarget position
| Assets | Current weight | Target weight | Deviation | Target market value | Theoretical action | Estimated post‑weight |
|---|
Trading friction and residual cash
04 · Sources & limits
Data sources and model boundaries
Investor.gov treats asset allocation and rebalancing as decisions that must incorporate time horizon and risk tolerance; the SEC primer lists three common approaches — selling overweighted positions, directing new funds to underweighted ones, and adjusting ongoing contributions — and warns about trading costs and tax consequences; FINRA also notes that diversification, allocation and rebalancing address different layers of risk management.[1] [2] [3]
This tool does not verify fund underlying holdings, correlations, liquidity, tax status, account restrictions, trading hours, minimum order size or asset quality; nor does it determine whether any target weights are suitable for an individual. Trading costs are only simplified estimates entered by the user and cannot substitute for broker fees, transaction taxes, capital gains tax or professional advice.
This page is a deterministic educational model, not a historical backtest, Monte Carlo, return forecast, asset allocation recommendation or trading directive. Please verify dates, currency, weights, fees and applicable regulations first. This is research and analysis only, not personalized financial advice.