Pacer Swan SOS ETFs Show Resilience Despite Market Volatility Pacer Swan SOS series ETFs, including PSFD and PSMR, have outperformed the S&P 500 during recent downturns, reporting smaller losses and consistent returns. Reduced management fees have also improved their appeal. The fund-of-funds PSFF holds significant allocations to these strategies, emphasizing investor demand for defensive, risk-managed products.56