Paper Trade library

Strategy 01

Simulation only

Weekly QQQ Drawdown Switch

A weekly ETF risk switch based on QQQ's distance from its 52-week high: 50% SPY / 50% QQQ when risk-on, and 34% SPY / 33% GLD / 33% SHY when risk-off.

This is an educational paper portfolio, not investment advice or a record of real trades. Past or simulated results do not guarantee future returns.

Current status

Risk-on

Latest completed weekly review recorded after Friday's close: August 28, 2026.

Total portfolio
$109,606
Review date
August 28, 2026
QQQ close
$716.43
Distance to high
-3.88%

Portfolio tool

Rebalance calculator

Enter the shares you currently hold. The calculator uses the latest completed weekly close and the current model allocation to estimate your target shares and trade differences.

Price snapshot: Aug 28, 2026

$769.35
$716.43
$408.89
$81.89

Total portfolio value

$0

ETFClose priceHolding valueTarget weightTarget sharesEstimated adjustment
SPY$769.35$050%0.00Hold 0.00
QQQ$716.43$050%0.00Hold 0.00
GLD$408.89$00%0.00Hold 0.00
SHY$81.89$00%0.00Hold 0.00

Illustrative only. Target shares use the shown closing prices and exclude slippage, spread, commissions, taxes, and fractional-share restrictions.

Historical record

Weekly backtests

The same model was replayed week by week using information available at each Friday close. Choose a year to inspect every decision.

Model return

+9.61%

Ending value

$109,606

SPY buy and hold

+13.10%

50/50 SPY + QQQ

+15.05%

Rebalances

3

Total slippage

$345

2026 Weekly journal

Review dateQQQ closeDistance to HighTotal PortfolioRegimeAction
Dec 31, 2025$613-3.25%$100,000Risk-onRebalanced (traded Jan 2, 2026, -$100)
Jan 2, 2026$612-3.44%$99,900Risk-onHeld allocation
Jan 9, 2026$625-1.31%$101,799Risk-onHeld allocation
Jan 16, 2026$620-2.16%$101,184Risk-onHeld allocation
Jan 23, 2026$621-1.93%$101,125Risk-onHeld allocation
Jan 30, 2026$620-2.06%$101,256Risk-onHeld allocation
Feb 6, 2026$608-3.98%$100,162Risk-onHeld allocation
Feb 13, 2026$601-5.20%$98,884Risk-onHeld allocation
Feb 20, 2026$607-4.12%$100,007Risk-onHeld allocation
Feb 27, 2026$606-4.36%$99,631Risk-onHeld allocation
Mar 6, 2026$598-5.54%$98,022Risk-onHeld allocation
Mar 13, 2026$592-6.49%$96,793Risk-onHeld allocation
Mar 20, 2026$581-8.33%$94,969Risk-onHeld allocation
Mar 27, 2026$562-11.29%$92,379Risk-offRebalanced (traded Mar 30, 2026, -$121)
Apr 10, 2026$610-3.64%$95,800Risk-onRebalanced (traded Apr 13, 2026, -$124)
Apr 17, 2026$6480.00%$100,020Risk-onHeld allocation
Apr 24, 2026$6630.00%$101,453Risk-onHeld allocation
May 1, 2026$6730.00%$102,719Risk-onHeld allocation
May 8, 2026$7100.00%$106,785Risk-onHeld allocation
May 15, 2026$708-1.51%$106,714Risk-onHeld allocation
May 22, 2026$717-0.31%$107,835Risk-onHeld allocation
May 29, 2026$7380.00%$110,206Risk-onHeld allocation
Jun 5, 2026$704-5.51%$106,301Risk-onHeld allocation
Jun 12, 2026$721-3.33%$107,859Risk-onHeld allocation
Jun 26, 2026$707-5.21%$106,007Risk-onHeld allocation
Jul 10, 2026$726-2.66%$109,303Risk-onHeld allocation
Jul 17, 2026$695-6.71%$106,139Risk-onHeld allocation
Jul 24, 2026$684-8.20%$104,971Risk-onHeld allocation
Jul 31, 2026$688-7.69%$105,831Risk-onHeld allocation
Aug 7, 2026$723-2.99%$110,393Risk-onHeld allocation
Aug 14, 2026$731-1.91%$111,234Risk-onHeld allocation
Aug 21, 2026$713-4.28%$109,119Risk-onHeld allocation
Aug 28, 2026$716-3.88%$109,606Risk-onHeld allocation

Historical adjusted-close data snapshot: Yahoo Finance chart API historical adjusted-close data. Friday close signal, next trading-session close execution, 252-session lookback, and 0.10% one-way slippage. Results are a historical simulation, not a recommendation.

The two portfolios

The signal chooses one of two fully invested target allocations. It does not forecast the cause or duration of a decline.

Risk-on

QQQ is no more than 10% below its 52-week high

SPY

U.S. large-cap stocks

50%

QQQ

Nasdaq-100 stocks

50%

Risk-off

QQQ is more than 10% below its 52-week high

SPY

U.S. large-cap stocks

34%

GLD

Gold

33%

SHY

1-3 year U.S. Treasuries

33%

The original 33% / 33% / 33% description totals 99%. This journal assigns the spare 1% to SPY so the model remains 100% invested.

Rules of record

1

Measure the signal

After each Friday close, divide QQQ's adjusted close by its highest adjusted daily close during the latest 252 trading sessions. Distance from high = (current close / 52-week high - 1) x 100.

2

Choose the regime

A distance of -10.00% or better is risk-on. A distance below -10.00% is risk-off. The same rule is used every week without an opinion override.

3

Trade at the next session

When the regime changes, rebalance at the next trading session's closing price. If the regime is unchanged, rebalance only when a holding differs from target by more than 5 percentage points.

4

Charge realistic friction

Deduct 0.10% from every dollar bought or sold. Dividends are reinvested through adjusted prices. Taxes and commissions are excluded because this is modeled as an IRA.

Weekly decision journal

Each review will preserve the data available that day, the formula result, the chosen allocation, and any simulated orders. Entries will not be rewritten using hindsight.

Review dateQQQ closeDistance to HighTotal PortfolioRegimeAction
Aug 28, 2026$716.43-3.88%$109,606Risk-onHeld allocation

What gets documented each week

  • Data date and source
  • QQQ adjusted close and 252-session high
  • Calculated distance and resulting regime
  • Portfolio value before trading
  • Target shares, simulated orders, and slippage
  • Ending holdings, cash rounding, and cumulative return

How the experiment will be judged

The model is useful only if its full experience is measured. The journal will compare it with buy-and-hold SPY and a 50/50 SPY-QQQ benchmark, while tracking total return, maximum drawdown, volatility, turnover, number of regime changes, and time spent risk-off.

Known limitations

  • A single 10% threshold can switch repeatedly in a choppy market.
  • QQQ is also held in the risk-on portfolio, so the signal and exposure are linked.
  • Gold and short Treasuries may not protect equally in every kind of selloff.
  • A close-based paper fill cannot reproduce spreads, taxes, tracking error, or intraday execution.
  • The model has no valuation, inflation, credit, or earnings input; simplicity is both its strength and its constraint.

Update point: edit the journal entries in lib/paper-trade-content.ts after each weekly review.

Weekly QQQ Drawdown Switch | David's Notes