ATEC Alphatec Holdings, Inc. Common Stock

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

ATEC vs XHE

Both indexed to 100 at 2026-05-11.

ATEC XHE · range 100–164 · 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 +0.64beyond mkt +0.47holdout +0.77stable 100%robust

GMED GLOBUS MEDICAL INC

ρ +0.55beyond mkt +0.36holdout +0.66stable 100%robust

SIBN SI-BONE, Inc. Common Stock

ρ +0.52beyond mkt +0.35holdout +0.70stable 100%robust

IHI iShares U.S. Medical Devices ETF

ρ +0.55beyond mkt +0.35holdout +0.67stable 100%robust

OFIX Orthofix Medical Inc. Common Stock (DE)

ρ +0.48beyond mkt +0.27holdout +0.59stable 100%robust

ISRG Intuitive Surgical, Inc. Common Stock

ρ +0.46beyond mkt +0.26holdout +0.56stable 100%robust

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

ρ -0.33beyond mkt -0.05holdout -0.25stable 88%robust

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

RIGL Rigel Pharmaceuticals, Inc. Common Stock

horizon 10dρ +0.54holdout +0.33stable 88%robust

BFAM BRIGHT HORIZONS FAMILY SOLUTIONS INC.

horizon 10dρ +0.43holdout +0.34stable 62%moderate

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

HZO MarineMax, Inc.

Δ -0.51recent -0.19prior +0.32beyond mkt +0.04

PR Permian Resources Corporation

Δ -0.51recent -0.39prior +0.12beyond mkt +0.07

XLE State Street Energy Select Sector SPDR ETF

Δ -0.49recent -0.40prior +0.09beyond mkt +0.03

NOG Northern Oil and Gas, Inc.

Δ -0.48recent -0.41prior +0.08beyond mkt -0.04

MGY Magnolia Oil & Gas Corporation Class A Common Stock

Δ -0.48recent -0.40prior +0.08beyond mkt +0.02

MEOH Methanex Corporation Common Stock

Δ -0.48recent -0.40prior +0.08beyond mkt -0.02

Strong beyond-the-market co-movement with few shared neighbours.

Symbol	beyond mkt	raw ρ	shared
IHI iShares U.S. Medical Devices ETF	+0.35	+0.55	14
XHE State Street SPDR S&P Health Care Equipment ETF	+0.47	+0.64	20
GMED GLOBUS MEDICAL INC	+0.36	+0.55	19
SIBN SI-BONE, Inc. Common Stock	+0.35	+0.52	19