Bloom Energy Rockets 38% on S&P Inclusion Amid AI Datacenter Growth Prospects

BE has gained 38% over the past month and is up 220% year to date, a run that traces to one identifiable event: S&P Dow Jones Indices announced on September 4 that Bloom Energy would join the S&P 500, and the company entered the benchmark in the September quarterly rebalance . Index inclusion produces buying that is not discretionary, because funds tracking the benchmark have to hold the stock at index weight. The shares trade at $277.81 , against $277.42 in the latest SentiSense snapshot.

The peer tape is what makes the case that this is mechanical rather than thematic. Over the same month PLUG fell 7% to $2.10 and FCEL fell 8% to $17.93, while the larger grid-adjacent name GEV was effectively flat at $953.22, down 0.4% . The S&P 500 ETF gained just 1% across the window . Whatever lifted Bloom Energy did not lift the names around it.

There is a growth argument underneath the flows, and it is worth separating from them. A comparative analysis against Eos Energy Enterprises credits Bloom with mature fuel-cell technology, established partnerships and profitability, and expects roughly 85% revenue growth this year on AI datacenter demand . Note what that same piece concludes: it prefers Eos on valuation, citing a more attractive price-to-sales ratio, precisely because Bloom's multiples have already expanded .

The bull and bear cases turn on the same fact. Bulls argue index inclusion permanently shifts the ownership base toward patient passive holders and structurally shrinks the float available for daily trading. Bears argue inclusion is a one-time event whose mechanical buying ends once the flows clear, leaving a stock that has already delivered a year of extraordinary gains with less room for disappointment .

SentiSense signals point the same direction as the tape but are cooling: the SentiSense Score reads bullish at a 21.5 thirty-day average against 9.5 today, with news and social sentiment at +0.28 over thirty days. Sell-side revisions ran ahead of the move rather than after it, with 11 of the 12 firms publishing targets in the 90 days before the September run revising upward. What settles the question from here is whether AI datacenter orders convert into the revenue trajectory the growth case assumes, once the rebalance flows are behind the stock.