mcpbeat

Portfolio Rebalance

anthropics/portfolio-rebalance

Analyze portfolio allocation drift and generate rebalancing trade recommendations across accounts. Considers tax implications, transaction costs, and wash sale rules. Triggers on "rebalance", "portfolio drift", "allocation check", "rebalancing trades", or "my portfolio is out of balance".

736 tokens
context cost
the whole folder, loaded on every use
1
files
instructions only
0
copies elsewhere
how many repositories repackaged it
33987
stars on the repo
on the repository, not the skill itself

Install

one command, takes just this skill from the repository
npx skills add https://github.com/anthropics/financial-services --skill portfolio-rebalance

The instruction itself

9 sections, as written by the author

Portfolio Rebalance

Workflow

Step 1: Current State

For each account, capture:

  • Account type (taxable, IRA, Roth, 401k)
  • Holdings with current market value
  • Cost basis (for taxable accounts)
  • Unrealized gains/losses per position

Step 2: Drift Analysis

Compare current allocation to IPS targets:

| Asset Class | Target % | Current % | Drift | $ Over/Under |

|------------|----------|-----------|-------|-------------|

| US Large Cap Equity | | | | |

| US Small/Mid Cap | | | | |

| International Developed | | | | |

| Emerging Markets | | | | |

| Investment Grade Bonds | | | | |

| High Yield / Credit | | | | |

| TIPS / Inflation Protected | | | | |

| Alternatives | | | | |

| Cash | | | | |

Flag positions exceeding the rebalancing band (typically ±3-5%).

Step 3: Trade Recommendations

Generate trades to bring allocation back to target:

Tax-Aware Rebalancing Rules:

  • Prefer rebalancing in tax-advantaged accounts (IRA, Roth) first — no tax consequences
  • In taxable accounts, avoid selling positions with large short-term gains
  • Harvest losses where possible while rebalancing
  • Watch for wash sale rules (30-day window) across all accounts
  • Consider directing new contributions to underweight asset classes instead of trading

Trade List:

| Account | Action | Security | Shares/$ | Reason | Tax Impact |

|---------|--------|----------|----------|--------|-----------|

| | Buy/Sell | | | Rebalance / TLH | ST gain / LT gain / Loss |

Step 4: Asset Location Review

Optimize which assets are held in which account types:

  • Tax-deferred (IRA/401k): Bonds, REITs, high-turnover funds (highest tax drag)
  • Roth: Highest expected growth assets (tax-free growth)
  • Taxable: Tax-efficient equity (index funds, ETFs, munis), tax-loss harvesting candidates

Step 5: Implementation

  • Total trades by account
  • Estimated transaction costs
  • Estimated tax impact (realized gains/losses)
  • Net effect on allocation drift

Step 6: Output

  • Drift analysis table
  • Recommended trade list (Excel)
  • Tax impact summary
  • Before/after allocation comparison

Important Notes

  • Don't rebalance for rebalancing's sake — small drift within bands is fine
  • Tax costs can outweigh rebalancing benefits in taxable accounts — calculate the breakeven
  • Consider pending cash flows (contributions, withdrawals, RMDs) before trading
  • Check for any client-specific restrictions (ESG, concentrated stock, lockups)
  • Document rationale for every trade for compliance records
  • Wash sale rules apply across accounts — coordinate trades across the household

How to use it

Copy the folder

Take anthropics/portfolio-rebalance from the repository into ~/.claude/skills for personal use, or into .claude/skills inside a project.

Check the name does not clash

The agent identifies a skill by the name field in its header. Two skills with the same name cannot sit side by side — one of them will be ignored.