Comfort Systems USA, Inc.

1. 01

   In line with SPY, ahead of its sector fund XLI over 1 year

   1 month: −40.0% (SPY −1.6%, XLI −1.2%). 3 months: −37.2% (SPY −0.4%, XLI −9.1%). 1 year: +14.2% (SPY +13.6%, XLI +11.0%). Price change to the 4 Nov 2026 close; dividends excluded.

   Daily closes, split-adjusted: FIX, SPY and XLI · as of 4 Nov 2026

2. 02

   Fell 15.1% on 4 Nov 2026

   The 4 Nov 2026 decline of 15.1% was 5.5× its average daily move of 2.8% over the past year, and its largest one-day decline since 27 Jan 2025.

   Daily closes, split-adjusted · as of 4 Nov 2026

3. 03

   Below its 50- and 200-day averages

   The 4 Nov 2026 close of $1,091.31 was 29.0% below its 50-day average ($1,536.64) and 32.1% below its 200-day average ($1,606.73). It has closed below the 200-day for 16 sessions, since 14 Oct 2026. The 50-day average crossed below the 200-day on 26 Oct 2026, 7 sessions ago.

   Daily closes, split-adjusted; 50- and 200-session simple averages · as of 4 Nov 2026

4. 04

   P/E 2.0× its peers' median

   Trailing P/E of 37.2 against a median of 18.5 across 3 peers named in its company record (range 15.0 to 52.5).

   Quote feed P/E (price ÷ trailing 12-month EPS); peers as named in the company record · as of 5 Nov 2026

5. 05

   Volume 3.5× its 30-session average on 4 Nov 2026

   4 Nov 2026 volume of 1.7M shares was 3.5× the average of the 30 sessions before it (485.7K), as the price fell 15.1%. SPY traded 1.5× its own average that session.

   Daily volume against a 30-session baseline · as of 4 Nov 2026

At the 4 Nov 2026 close