Very few stocks made the "100% club" in the third quarter, meaning they saw shares more than double in the span of just three months. Tuesday marked the final session of the third quarter, which saw the S & P 500 gain nearly 8%, the tech-heavy Nasdaq Composite jump more than 11% and the Dow Jones Industrial Average rise more than 5% since the end of June. U.S. stocks recorded an unusually solid September, during which the S & P 500 gained more than 3% in a month that has averaged a 4.2% drop over the past five years. As the bull market has roared onward — powering through ongoing concerns tied to high market concentration and valuation levels, artificial intelligence fervor and macroeconomic health — a handful of names managed to deliver sky-high returns. Among them were several tech stock

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