Bloom Energy Just Joined the S&P 500. Here's What History Says Happens Next.

Bloom Energy (BE) joined the S&P 500 on September 21, 2026, capping a 1,880% rally over two years. Index inclusion forces passive funds that track the benchmark to buy the stock, creating a structural demand source on top of the momentum already behind the shares.

The fuel cell developer supplies power systems to major AI data center operators, and it carries a $20 billion backlog. Analysts cited in the report project strong revenue and EBITDA growth, and they see substantial upside from here despite elevated valuation multiples.

Interpretation: a $20 billion backlog gives the growth projections a contracted base, which may help the stock defend a rich multiple. At the same time, a near-1,900% two-year run means much of the optimism is likely already reflected in the price, and index-fund buying is a one-time mechanical flow rather than a durable earnings driver.

The source ties BE's trajectory to AI data center power demand, so the stock's fortunes depend on that customer base continuing to order systems. The valuation concern analysts flag is the central tension: growth expectations are high, and the multiples leave limited room for a miss.