Comfort Systems

FIX · United States

Comfort Systems traded $1.6B on 23 Oct 2026, 2.5× its 20-session average. Sector: Industrial Capital Goods & Transport.

504 trading days of history, to 2026-10-23 · all values converted to USD

Last close

$1,160.86

23 Oct

1-day change

-9.3%

vs previous close

Market cap

$40.9B

as of 23 Oct

Turnover

3.9%

of market cap traded

Dollar volume

$1.6B

as of 23 Oct

vs prior 20 sessions

2.5×

as of 23 Oct

Share of market volume

0.41%

as of 23 Oct

Volatility

58.2%

annualised

Infinity volume insights

since 14 April 2025

Every session our rules flagged for this company since 14 April 2025: 17. Those marked “In the feed” were published in the daily feed at the time; the rest are computed with the rules in use now. The feed shows a few a day across every market, so most never appear there. We began tracking this company on 28 September 2026; findings before then are marked “Before we tracked it”: it traded that way, and we were not yet watching.

2026-10-23
Comfort Systems moved -9.3% on 2.5× its average dollar volume
2.6 standard deviations from its usual daily change (standard deviation 3.6% across 503 earlier sessions). $1.6B against a 20-day average of $622.8M, on a falling price (-9.3%). Dollar volume 2.5× normal; turnover 3.9% of market cap (3.4× its usual turnover).

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Volume by window

	Dollar volume	vs prior 20 sessions
Last session	$1.6B	2.5×
Week	For members · Sign in
Month

Sessions to 23 Oct.

Infinity sector: Industrial Capital Goods & TransportBased on 249 companies, 79.2% of the S&P 500's trading.

Price and dollar volume

Bars coloured by direction

The last three months, one point a week (the week's last close and its total dollar volume).

How these are measured

Turnover: — dollar volume over market cap; how hard this name is traded relative to its size.
Vs prior 20 sessions: — above 1 means heavier trading than in the 20 sessions before it.
Share of market volume: — of the 250 names tracked in United States, not the whole market.
Volatility: — from daily returns over the held history. Indicative, not a risk model.
Market cap: — the latest session's close × shares outstanding, in USD. Each day in the history has its own, from that day's close; the share count is refreshed monthly.

Prices and volume via the daily pipeline, converted to USD.

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