--- title: "Rebalance with new money before you sell" description: "One portfolio, four ways to rebalance and a clear reason for the choice. Start with what your next contribution can achieve." canonical: "https://investboard.com/knowledge/ai-portfolio-demo" language: "en" published: "2026-11-10" modified: "2026-11-10" last_verified: "2026-11-10" author: "David Bartas" author_url: "https://investboard.com/about" --- # Rebalance with new money before you sell One portfolio, four ways to rebalance and a clear reason for the choice. Start with what your next contribution can achieve. ## In short The €400 no-sale route restores 90/10 to cent rounding. The contribution first raises the total to €11,706.20, making equities underweight before purchases. Of the €400, €229.38 buys equities and €170.62 stays in cash. No individual fund is selected. A contribution is not investment return. - Read the portfolio and the plan together - Compare new money with the alternatives - Check what each route actually achieves - Keep the reason for your choice Your portfolio has drifted. Before selling, find out whether your next contribution can bring it back to your chosen targets. This worked example compares four routes, keeps doing nothing on the table and turns the investor’s choice into a decision note. [Download the rebalance example](/downloads/ai-portfolio-demo.zip) Install Portfolio Intelligence, Investment Strategy Check and Investment Decision-Making through the AI Toolkit. In the connected workflow, reuse your authorized Investboard connection. Your own results depend on your portfolio and plan; the sample figures below are not a live account run. To try the file-only version now, follow walkthrough-en.md in the download. It explains when to attach each file and requires no Investboard account. Your assistant provider’s requirements, quota and fees apply. The example starts with €7,000 in MSCI World, €2,000 in DAX and €1,000 cash on November 10, 2025. Real EUR total-return-series observations through November 9, 2026 model the fund sleeves. Starting amounts, 90/10 targets, ±2 percentage-point bands, an €800 reserve and the contribution budgets are illustrative user inputs. Cash earns zero interest; there are no interim flows. The observations are adjusted series values, not executable quotes. Both funds are equities. Targets apply to the asset classes, not to either fund individually. ## Read the portfolio and the plan together At the review, the modeled portfolio is worth €11,306.20: €8,109.25 in MSCI World, €2,196.95 in DAX and €1,000 cash. Together the funds are €10,306.20 of equities. The class weights are 91.16% equities and 8.84% cash, both within their ±2-point bands. Cash exceeds the €800 reserve. The plan does not require a trade. > Read my authorized holdings and mandate. Show allocation, target bands, reserve cash and evidence dates for the same scope. Explain any breaches. Do not save a check or change records; identify missing evidence. ## Compare new money with the alternatives The investor has €400 outside this portfolio and prefers buying underweights before considering sales. Compare that preference with three other routes and the unchanged baseline. These are gross sample allocations before fees, spreads and taxes, not executable orders. > Use Investboard’s rebalance comparison on the same snapshot. Compare no change, €400 of new money without sales, €100 without sales, selling equities and a €100 hybrid. Show resulting weights, remaining drift, reserve cash and cost/tax coverage. Do not save anything. If the comparison tool is unavailable, say so. | Route | New money | Equities change | Cash change | Equities / cash | | --- | --- | --- | --- | --- | | Unchanged | €0.00 | €0.00 | €0.00 | 91.16 / 8.84% | | €400, no sales | €400.00 | Buy €229.38 | +€170.62 | 90 / 10% | | €100, no sales | €100.00 | €0.00 | +€100.00 | 90.36 / 9.64% | | Sell equities | €0.00 | Sell €130.62 | +€130.62 | 90 / 10% | | €100 hybrid | €100.00 | Sell €40.62 | +€140.62 | 90 / 10% | The €400 no-sale route restores 90/10 to cent rounding. The contribution first raises the total to €11,706.20, making equities underweight before purchases. Of the €400, €229.38 buys equities and €170.62 stays in cash. No individual fund is selected. A contribution is not investment return. ## Check what each route actually achieves Selling €130.62 of equities with no new money also restores 90/10 gross. Adding €100 reduces that sale to €40.62. With €100 and no sales, equities remain overweight: the full contribution stays in cash, producing 90.36/9.64%. Maximum drift falls from about 1.16 to 0.36 percentage points, but exact targets are not restored. Keeping the portfolio unchanged remains valid. > Compare the routes with my own bands, reserve and preference. Separate exact targets from staying within tolerance. Show a €100 buy-only alternative and its remaining drift. Do not invent costs, taxes or a requirement to trade; do not create a saved check. The conservative minimum new cash for exact, unrounded no-sale targets is €145.14 before costs. All sample routes preserve the €800 reserve gross. Existing cash is below target, so spending it on more equities would increase the imbalance. Missing tax inputs, quotes and dealing constraints prevent an after-cost or execution-feasibility claim. ## Keep the reason for your choice The sample investor explicitly chooses the €400 no-sale candidate for further review: the money is available and avoiding sales is their preference. That makes it the preferred route in this case, without making it universally best. > I select the €400 contribution-only candidate for further review. Draft my reason and the alternatives I considered. Acknowledge that keeping things unchanged also fits my bands and list what still needs checking. Do not save, infer execution or later performance, or set a reminder. > I selected the €400 contribution-only candidate because it restores my targets gross without selling. Keeping my current allocation also satisfies my bands. Before implementation I need current dealing quotes, costs and broker rules. I have not placed an order, and no later outcome is known. The result is a comparison and a reason you can revisit. A conversation draft does not save a journal review. Saving a mandate check or an investor-stated outcome needs a separate explicit request; neither proves execution. No company-level overlap is measured here, and the two funds need not hold distinct companies. ## Frequently asked questions ### Will this place orders or save my journal? No. Comparing options does not place orders, and a conversation draft does not save a journal review. Saving a mandate check or stated outcome requires a separate explicit request. The file-only example needs no Investboard account. ## Sources - [FMP historical EOD data documentation](https://site.financialmodelingprep.com/developer/docs/stable/historical-price-eod-full) - [iShares Core MSCI World UCITS ETF USD (Acc)](https://www.ishares.com/uk/individual/en/products/251882/ISHARES_MSCI_WORLD_UCITS_ETF) - [iShares Core DAX UCITS ETF (DE)](https://www.ishares.com/uk/individual/en/products/251464/fund) - [Investor.gov: asset allocation and rebalancing](https://www.investor.gov/additional-resources/general-resources/publications-research/info-sheets/beginners-guide-asset) ## Related reading - [Rebalancing as discipline, not timing](/knowledge/portfolio-rebalancing) - [Investment Policy Statement for private investors: your mandate](/knowledge/investment-policy-statement) - [How to use AI in Investboard: A practical guide](/knowledge/ai-investing-guide)