NHC National Healthcare Corp.

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

NHC vs XHS

Both indexed to 100 at 2026-05-11.

NHC XHS · range 95–134 · 2026-05-11 → 2026-11-06

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

XHS State Street SPDR S&P Health Care Services ETF

ρ +0.49beyond mkt +0.37holdout +0.51stable 100%robust

PNTG The Pennant Group, Inc. Common Stock

ρ +0.44beyond mkt +0.33holdout +0.46stable 100%robust

ENSG The Ensign Group, Inc. Common Stock

ρ +0.43beyond mkt +0.33holdout +0.37stable 100%robust

HCSG Healthcare Services Group, Inc. Common Stock

ρ +0.43beyond mkt +0.29holdout +0.42stable 100%robust

USPH US Physical Therapy Inc

ρ +0.42beyond mkt +0.26holdout +0.33stable 100%robust

VMD Viemed Healthcare, Inc. Common Shares

ρ +0.39beyond mkt +0.25holdout +0.26stable 100%robust

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

HG Hamilton Insurance Group, Ltd. Class B Common Shares

horizon 10dρ +0.46holdout +0.48stable 88%robust

GRC The Gorman-Rupp Company Common Shares

horizon 5dρ +0.36holdout +0.07stable 62%moderate

XLP State Street Consumer Staples Select Sector SPDR ETF

horizon 5dρ +0.36holdout +0.37stable 88%robust

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

GRC The Gorman-Rupp Company Common Shares

Δ -0.50recent -0.16prior +0.34beyond mkt +0.03

PRLB PROTO LABS, INC.

Δ -0.49recent -0.16prior +0.33beyond mkt +0.07

XIFR XPLR Infrastructure, LP

Δ -0.47recent -0.30prior +0.17beyond mkt -0.01

FLS Flowserve Corporation

Δ -0.47recent -0.17prior +0.30beyond mkt +0.02

IOSP Innospec Inc. Common Stock

Δ -0.47recent -0.08prior +0.39beyond mkt +0.08

CTS CTS Corporation

Δ -0.46recent -0.15prior +0.31beyond mkt +0.05

Abnormal volume rises and falls on the same days as NHC'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
TCX Tucows Inc. Class A Common Stock	+0.32	+0.17	-0.00	6e-10
SENEA Seneca Foods Corp. Class A Common Stock	+0.32	+0.17	+0.05	1e-9
FBIZ First Business Financial Services, Inc. Common Stock	+0.31	+0.15	-0.04	2e-9

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

Symbol	beyond mkt	raw ρ	shared	isolation
XHS State Street SPDR S&P Health Care Services ETF	+0.37	+0.49	13