US stocks and gold are hurtling toward a fourth year of double-digit gains, rallies so exceptional that there have been few such episodes in history, according to Bank of America Corp. strategists.

The S&P 500 is set for an annualized 20% gain while bullion is on track for a 30% rally, said the team led by Michael Hartnett. For stocks, such prolonged, “big stuff” advances only played out in World War II, the period of peace that followed a few years after that conflict and in the bubble of 1995-1999, they said.