ERII Energy Recovery, Inc. Common Stock

together opposite · bar = ρ at each lag, −10 … 0 … +10 days · holdout ρ · click a card for the full picture

ERII vs GRC

Both indexed to 100 at 2026-05-11.

ERII GRC · range 76–118 · 2026-05-11 → 2026-11-06

Same day, ranked by what's left after the market and sector factors are removed ("beyond mkt").

GRC The Gorman-Rupp Company Common Shares

ρ +0.55beyond mkt +0.20holdout +0.57stable 100%robust

VSEC VSE Corporation Common Stock

ρ +0.46beyond mkt +0.18holdout +0.52stable 100%robust

BMI Badger Meter, Inc.

ρ +0.42beyond mkt +0.18holdout +0.36stable 100%robust

PRVA Privia Health Group, Inc. Common Stock

ρ +0.32beyond mkt +0.17holdout +0.24stable 88%robust

OFIX Orthofix Medical Inc. Common Stock (DE)

ρ +0.36beyond mkt +0.16holdout +0.28stable 88%robust

CGW Invesco S&P Global Water Index ETF

ρ +0.51beyond mkt +0.16holdout +0.52stable 100%robust

VXX iPath Series B S&P 500 VIX Short-Term Futures ETN

ρ -0.40beyond mkt +0.09holdout -0.48stable 100%robust

VIXM ProShares VIX Mid-Term Futures ETF

ρ -0.35beyond mkt +0.07holdout -0.41stable 100%robust

BTAL AGF U.S. Market Neutral Anti-Beta Fund

ρ -0.43beyond mkt +0.02holdout -0.47stable 100%robust

No day-to-day relationship, but 5- or 10-day returns move together.

CNDT Conduent Incorporated Common Stock

horizon 5dρ +0.32holdout +0.30stable 75%robust

Biggest shifts in same-day correlation over the last 63 trading days versus the year before.

MG Mistras Group Inc.

Δ -0.65recent -0.22prior +0.43beyond mkt +0.05

HZO MarineMax, Inc.

Δ -0.63recent -0.25prior +0.38beyond mkt -0.04

DOCU DocuSign, Inc. Common Stock

Δ -0.50recent -0.33prior +0.16beyond mkt -0.03

BWMN Bowman Consulting Group Ltd. Common Stock

Δ -0.49recent -0.05prior +0.44beyond mkt +0.14

REFI Chicago Atlantic Real Estate Finance, Inc. Common Stock

Δ -0.45recent -0.09prior +0.36beyond mkt +0.01

PMTS CPI Card Group Inc. Common Stock

Δ -0.45recent -0.12prior +0.33beyond mkt +0.02

Abnormal volume rises and falls on the same days as ERII's, while prices do not move together: the same hands, not the same business.

Symbol	traded together ρ	big prints together ρ	priced together ρ	q
SNDA Sonida Senior Living, Inc.	+0.41	+0.28	+0.01	<1e-15
ECPG Encore Capital Group Inc Common Stock	+0.40	+0.24	+0.01	<1e-15
UMH UMH Properties, Inc.	+0.39	+0.27	-0.01	<1e-15
HDSN Hudson Technologies, Inc. Common Stock	+0.39	+0.33	+0.09	<1e-15
TBLA Taboola.com Ltd. Ordinary Shares	+0.41	+0.28	+0.12	<1e-15
GRPN Groupon, Inc. Common Stock	+0.41	+0.25	-0.08	<1e-15