Best Momentum ETF Portfolio for Q3 2026

Momentum investing remains one of the most robust and academically proven factors in modern finance. For 2026, constructing the best momentum ETF portfolio involves combining cross-sectional (relative) momentum to pick the strongest assets, with time-series (absolute) momentum to protect against sudden bear markets.

The Case for Momentum in 2026

With shifting interest rate expectations and rotating sector leadership, a static buy-and-hold portfolio may face severe headwinds. A dynamic momentum ETF strategy adapts by systematically overweighting the outperforming sectors (such as Tech, Energy, or Financials) while avoiding the laggards.

Core ETF Selection

To build this portfolio, you do not need complex or expensive funds. You can implement it using basic, low-cost index ETFs. The core components typically include a broad US Equity ETF (like VOO or SPY), an International Equity ETF (like VXUS or VEA), and a safe-haven Aggregate Bond ETF (like BND or AGG).

Implementation Rules

On the last trading day of each month, evaluate the trailing 6-month or 12-month performance of your equity ETFs. Allocate 100% of your risk capital to the ETF with the highest return. However, if the leading ETF has a negative return over the same period, move 100% to your Bond ETF. This simple rule serves as an automatic circuit breaker.

"Dual momentum is the clean integration of relative strength momentum and trend following absolute momentum. They complement each other perfectly." — Gary Antonacci

The GEM Execution Rules

GEM is rebalanced exactly once per month. At the end of each month, the investor carries out the following steps:

1. Calculate the trailing 12-month return of S&P 500 (representing US stocks) and MSCI ACWI ex-US (representing global stocks).
2. Select the index with the higher return.
3. Compare the return of this winning index to the trailing 12-month return of 1-3 Month Treasury Bills (cash proxy).
4. If the winning equity return is greater than cash, invest 100% in that equity index. Otherwise, invest 100% in a broad U.S. Aggregate Bond index (like BND or AGG).

Why GEM Works

Historically, equities spend about 70-80% of the time in bull markets. Relative momentum keeps the investor aligned with the strongest equity markets (whether that's US tech stocks or international value plays). However, when severe bear markets emerge (such as the 2008 financial crisis or the 2000 dot-com crash), absolute momentum acts as a circuit breaker, moving the entire portfolio into high-quality bonds. This reduces drawdown risk and protects capital.

ETF Implementations

A typical retail investor can implement GEM using just three low-cost, liquid ETFs:

• US Stocks: Vanguard S&P 500 ETF (VOO) or SPDR S&P 500 ETF (SPY)
• International Stocks: Vanguard Total International Stock ETF (VXUS) or iShares Core MSCI ACWI ex U.S. ETF (ACWX)
• Aggregate Bonds: Vanguard Total Bond Market ETF (BND) or iShares Core U.S. Aggregate Bond ETF (AGG)