Silver’s recent strength is attracting attention, with investors and analysts debating whether the metal is primed for a sustained period of outperformance. Three charts – the gold-to-silver ratio, silver's relative value against the S&P 500, and a major long-term technical breakout – offer evidence that silver may be entering a new bull phase.The gold-to-silver ratio, which measures how many ounces of silver are needed to equal one ounce of gold, is one of the oldest continuously tracked relationships in m ...