Daily momentum-based bet between US and Europe stocks: if SPY outperforms IEUR over the last 30 days, invest entirely in SPY; otherwise invest entirely in IEUR; rebalance every day.

Each day, the system compares how much SPY and IEUR would have earned over the last 30 days (this is the 30-day cumulative return). If SPY’s 30-day gain is higher than IEUR’s, you invest 100% of your money in SPY (US stocks). If IEUR’s 30-day gain is higher, you invest 100% of your money in IEUR (Europe stocks). The wrapper says 100/100, which just reinforces putting all capital into the chosen ETF and not holding both at once. Because it rebalances daily, the portfolio can swing between the US and Europe depending on recent performance. SPY is the fund tracking US large-cap stocks; IEUR tracks Europe’s developed markets. The idea is simple: ride the side that has performed better recently, and switch bets every day based on that short-term momentum.

Out-of-sample edge: daily US-vs-Europe momentum delivers ~35% annualized return vs SPY ~17%, Sharpe ~2 vs ~1, and lower drawdown (~14% vs ~19%). Positive alpha means stronger risk-adjusted growth by riding the winner region.