Core Satellite Allocator Calculator

Define core holdings with portfolio level weights. Add satellite picks with weights relative to the satellite sleeve only. Allocate 80% core across VTI and VXUS at 60/40 within core. Add satellite picks like individual tech stocks at relative weights summing to 100% within the 20% satellite sleeve. Example core: 50% US total market ETF, 30% international ETF, 20% bond ETF within 80% core sleeve. Satellites: individual stocks summing to 100% of remaining 20%. Document investment policy stating max 5% per satellite and 80% minimum core to enforce discipline during bubbles. Core can mix stocks bonds and REITs as long as weights sum to chosen core percentage of total portfolio. Allocate 80% core across VTI and VXUS at 60/40 within core. Add satellite picks like individual tech stocks at relative weights summing to 100% within the 20% satellite sleeve. Enter core index weight and satellite sleeve tickers with targets: tool flags when satellite drift exceeds tolerance band. Allocate 80% core across VTI and VXUS at 60/40 within core. Add satellite picks like individual tech stocks at relative weights summing to 100% within the 20% satellite sleeve. Enter core index weight and satellite sleeve tickers with targets: tool flags when satellite drift exceeds tolerance band. Allocate 80% core across VTI and VXUS at 60/40 within core. Add satellite picks like individual tech stocks at relative weights summing to 100% within the 20% satellite sleeve.

Review effective allocations and concentration warnings to keep satellite bets appropriately sized. Effective allocation converts satellite relative weights to portfolio level percentages. A satellite at 50% of sleeve equals 10% of total portfolio when core is 80%. Concentration warning at 5% total portfolio per satellite prevents one moonshot from dominating risk. Rebalance satellites quarterly while core drifts annually to control turnover and tax drag. Name each satellite thesis in notes so future you remembers why the position exists when rebalancing. Satellite sleeve is for tactical bets not emergency cash reserves. Schedule an annual review of core versus satellite weights. Effective allocation converts satellite relative weights to portfolio level percentages. A satellite at 50% of sleeve equals 10% of total portfolio when core is 80%. Core should be broad low cost ETF while satellites hold factor tilts, sector bets, or single stocks you research actively. Effective allocation converts satellite relative weights to portfolio level percentages. A satellite at 50% of sleeve equals 10% of total portfolio when core is 80%. Core should be broad low cost ETF while satellites hold factor tilts, sector bets, or single stocks you research actively. Effective allocation converts satellite relative weights to portfolio level percentages. A satellite at 50% of sleeve equals 10% of total portfolio when core is 80%.

Test your assumptions with conservative and optimistic scenarios. Review concentration warnings for any single satellite position. Run allocation checks quarterly when satellite sleeve volatility is high.

Use Core Satellite Allocator whenever inputs change: after market moves, new contributions, or revised personal assumptions. Bookmark the page for quick reruns without installing software.

Example scenario for Core Satellite Allocator: 80%, 100%, 20%. Enter those values above to reproduce the walkthrough described in How it works.

Adjust one input at a time to see sensitivity. Core Satellite Allocator updates instantly so you can stress test optimistic and conservative assumptions before acting.

Reach for Core Satellite Allocator when model core satellite portfolios with effective weights and concentration checks.. It suits quick what if analysis before trades, allocation changes, or plan updates.

Pair with related tools when the decision spans taxes, liquidity, or multi year projections beyond what one formula captures.

Copying outputs without checking input units or stale market prices is a frequent error with Core Satellite Allocator. Confirm tickers, percentages, and dates before acting.

Running a single baseline scenario ignores tail risks. Stress test with conservative inputs and compare against related tools listed below when the decision is material.

Core weights entered as portfolio percentages. Does not model correlation between satellites. Multiple tech satellites may act as one concentrated bet. Sum effective satellite weights plus core should total 100% before adding new satellite ideas. Refresh satellite weights after corporate actions like splits affecting share counts. Does not model correlation between satellites. Multiple tech satellites may act as one concentrated bet. Does not model options overlay on core: covered call ETFs behave differently from plain index core. Does not model correlation between satellites. Multiple tech satellites may act as one concentrated bet. Does not model options overlay on core: covered call ETFs behave differently from plain index core. Does not model correlation between satellites. Multiple tech satellites may act as one concentrated bet. Core Satellite Allocator does not replace personalized advice. Fees, slippage, account specific rules, and behavioral constraints may change real world outcomes.

More calculators: target allocation drilldown, rebalancer, risk parity. Use those calculators when core satellite allocator alone does not capture the full decision.

Internal links on portfolios.tools help you chain calculators: run Core Satellite Allocator first, then validate edge cases with a specialized tool from the related section below.