Electrical Surge AI Data Center Setup FIX

What happened

Comfort Systems' electrical segment surged 88% as data center demand accelerates, raising the question of whether electrical services will become a larger share of the mix. However, the stock trades at 57.7x P/E and 58.6x EV/EBITDA, pricing in sustained peak fundamentals while the $9.38B RPO must convert at 65-75% and gross margins hold without accounting tailwinds. The electrical surge is real growth, but it also concentrates revenue in tech (45.8% of Q3'25) and a single customer (13.3% of 2024), increasing lumpiness. Management's own filings warn backlog has limited predictive value beyond 12 months and can be cancelled, yet the market treats the AI/data center narrative as durable. Waiting for either a 20%+ pullback or two quarters of clean conversion and margin evidence is prudent before committing new capital.

Implication

Monitor RPO conversion rates (65-75% target) and gross margin (current ~24.8% with catch-up tailwinds) over the next 6-9 months. If backlog converts cleanly and tech capex remains elevated, the electrical surge could drive upside to ~$1,650 (bull case). But any slowdown in hyperscaler spending or margin normalization would justify the $900 bear case. Entry near $1,100 offers better asymmetry.

Thesis delta

The electrical segment's accelerated growth increases the probability of a structural mix shift toward higher-margin technology work, but it also amplifies cyclicality and customer concentration. This tightens the range of outcomes: the bull case gets a lift from larger tech exposure, but the bear case becomes more sensitive to data-center capex cycles. The existing WAIT rating remains appropriate until RPO conversion and margin quality can be validated without one-time benefits.