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Investment Portfolio Tracker

Track your investments, monitor asset allocation, calculate gains/losses, and identify rebalancing opportunities.

Investment Portfolio Management

Why Track Your Portfolio?

Know where you stand: Understand your total wealth and how it's distributed

Monitor performance: Track gains, losses, and overall returns

Stay balanced: Identify when your allocation drifts from targets

The Power of Rebalancing: Portfolios rebalanced annually historically outperform buy-and-hold by 0.5-1% per year due to "selling high, buying low."

Asset Classes Explained

US Stocks

  • Historical return: ~10%/year
  • High volatility, high growth
  • Examples: VTI, VOO, SPY
  • Best for: Long-term growth

International Stocks

  • Historical return: ~7-8%/year
  • Diversification benefits
  • Examples: VXUS, IXUS, EFA
  • Best for: Global exposure

Bonds

  • Historical return: ~4-5%/year
  • Lower volatility, stable income
  • Examples: BND, AGG, VBTLX
  • Best for: Stability, income

Real Estate (REITs)

  • Historical return: ~8-10%/year
  • Inflation hedge, dividends
  • Examples: VNQ, SCHH, RWR
  • Best for: Income, diversification

Model Portfolio Allocations

Aggressive (Age 20-35)

90% Stocks / 10% Bonds | Expected: 8-10%/year

Best for: Long time horizon, high risk tolerance

Moderate (Age 35-50)

70% Stocks / 30% Bonds | Expected: 6-8%/year

Best for: Balanced growth and stability

Conservative (Age 50-65)

50% Stocks / 50% Bonds | Expected: 5-6%/year

Best for: Capital preservation near retirement

Income (Retirement)

30% Stocks / 70% Bonds | Expected: 4-5%/year

Best for: Steady income, low volatility

When to Rebalance

Calendar Method: Rebalance annually (e.g., January or birthday)

Threshold Method: Rebalance when allocation drifts 5%+ from target

New Money Method: Direct new investments to underweight assets

Tax Tip: Rebalance in tax-advantaged accounts (401k, IRA) first to avoid capital gains taxes.

Portfolio Mistakes to Avoid

  • Over-diversifying (owning 50+ funds creates unnecessary complexity)
  • Chasing past performance (last year's winners rarely repeat)
  • Ignoring fees (1% fee costs $200k+ over 30 years on $500k portfolio)
  • Emotional trading (buying high in euphoria, selling low in panic)
  • Home country bias (US is only ~60% of global market cap)
  • Not rebalancing (drift can increase risk by 20-30%)

Portfolio Action Plan

  1. Enter all your investment holdings in the tracker
  2. Set your target allocation based on age and risk tolerance
  3. Review current vs target allocation
  4. Identify rebalancing opportunities (5%+ drift)
  5. Execute trades in tax-advantaged accounts first
  6. Schedule annual portfolio review

Frequently Asked Questions

Most experts recommend rebalancing annually or when allocations drift 5%+ from targets. Three methods: (1) Calendar — rebalance once per year on a set date. (2) Threshold — rebalance when any asset class drifts 5%+ from target. (3) New money — direct new contributions to underweight assets to avoid selling. Rebalance in tax-advantaged accounts first, then use new contributions in taxable accounts. Annual rebalancing adds ~0.5% return per year.
The "110 minus age" rule gives a starting point. Age 30: 80% stocks/20% bonds. Age 50: 60% stocks/40% bonds. Modern advisors use "120 minus age" for longer life expectancies. Adjust ±10% for risk tolerance. Important: keep 30-50% in stocks even in retirement — a 30-year retirement needs growth, and inflation erodes bond-only portfolios.
Simple method (no contributions): (Ending - Beginning) / Beginning. With contributions, use: (Ending - Beginning - Contributions) / (Beginning + 0.5 x Contributions). For precise results with varied cash flow timing, use Excel's XIRR function. Track three metrics: total return (gains + dividends), real return (minus inflation), and risk-adjusted return (Sharpe ratio).
For most investors, low-cost index ETFs and mutual funds are virtually identical. ETFs: trade intraday, slightly lower expense ratios, more tax efficient, no minimums. Mutual funds: buy exact dollar amounts, easier auto-invest setup, no bid/ask spread. Example: VTI (ETF) at 0.03% vs VTSAX (mutual fund) at 0.04% — $10/year difference on $100K. Use mutual funds in 401(k), either in IRA/taxable.
Most experts recommend 20-40% of stock allocation in international. The US is only ~60% of global market cap. International outperformed the US in the 1970s, 1980s, and 2000s. Conservative: 20% international. Moderate: 30%. Market-weight: 40%. Jack Bogle said 0-20% is fine since US companies are global, but most advisors recommend at least 20-30% for true diversification.
Rebalance in tax-free zones first: 401(k), IRA (no taxes on trades), Roth (never taxed), HSA (triple tax-free). In taxable accounts: use new contributions to rebalance, reinvest dividends strategically, and tax-loss harvest when selling at a loss. Long-term capital gains tax (0-20%) is much lower than short-term (up to 37%), so avoid selling positions held less than one year.

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