STAA STAAR Surgical Company Common Stock

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

STAA vs XHE

Both indexed to 100 at 2026-05-11.

STAA XHE · range 69–129 · 2026-05-11 → 2026-11-06

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

XHE State Street SPDR S&P Health Care Equipment ETF

ρ +0.35beyond mkt +0.16holdout +0.24stable 88%robust

ALC Alcon Inc. Ordinary Shares

ρ +0.30beyond mkt +0.16holdout +0.35stable 75%robust

IART Integra LifeSciences Holdings Corporation Common Stock

ρ +0.31beyond mkt +0.14holdout +0.24stable 75%robust

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

PI Impinj, Inc. Common Stock

horizon 10dρ +0.41holdout +0.27stable 38%moderate

RZC Reinsurance Group of America, Incorporated 7.125% Fixed-Rate Reset Subordinated Debentures due 2052

horizon 10dρ +0.39holdout +0.35stable 50%moderate

AIZ Assurant, Inc.

horizon 10dρ +0.38holdout +0.38stable 62%moderate

AFG American Financial Group, Inc.

horizon 10dρ +0.37holdout +0.32stable 62%moderate

VNM VanEck Vietnam ETF

horizon 10dρ +0.37holdout +0.47stable 50%moderate

WST West Pharmaceutical Services, Inc.

horizon 10dρ +0.36holdout +0.23stable 38%moderate

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

SPRC SciSparc Ltd. Ordinary Shares

Δ -0.55recent -0.39prior +0.16beyond mkt +0.04

NOG Northern Oil and Gas, Inc.

Δ -0.53recent -0.39prior +0.14beyond mkt -0.04

NBR Nabors Industries Ltd.

Δ -0.50recent -0.30prior +0.20beyond mkt +0.03

MG Mistras Group Inc.

Δ -0.50recent -0.35prior +0.15beyond mkt -0.05

FTI TechnipFMC plc Ordinary Share

Δ -0.50recent -0.35prior +0.15beyond mkt +0.01

EGY Vaalco Energy, Inc.

Δ -0.49recent -0.37prior +0.13beyond mkt -0.02

Abnormal volume rises and falls on the same days as STAA'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	score	q
KMDA Kamada Ltd. Ordinary Shares	+0.38	+0.17	-0.07		<1e-15