NPKI NPK International Inc.

Last close: 8.64
504-day return: +32.52%
Median $/day: $7.9M
Relationships shown: 13
Leader rank: #996

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

NPKI vs FET

Both indexed to 100 at 2026-05-11.

NPKI FET · range 56–162 · 2026-05-11 → 2026-11-06

Follows NPKI

These tend to repeat NPKI's moves later.

OPK OPKO Health, Inc. Common Stock

lag 1dρ -0.21holdout -0.14stable 75%$/day $3.6Mrobust

Moves with NPKI

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

FET Forum Energy Technologies, Inc.

ρ +0.53beyond mkt +0.24holdout +0.54stable 100%robust

OIH VanEck Oil Services ETF

ρ +0.56beyond mkt +0.24holdout +0.46stable 100%robust

RES RPC, Inc.

ρ +0.47beyond mkt +0.22holdout +0.39stable 88%robust

NGS Natural Gas Services Group, Inc.

ρ +0.50beyond mkt +0.21holdout +0.47stable 100%robust

TTI TETRA Technologies, Inc.

ρ +0.52beyond mkt +0.19holdout +0.54stable 100%robust

EFXT Enerflex Ltd.

ρ +0.48beyond mkt +0.19holdout +0.47stable 100%robust

Moves against NPKI

TAIL Cambria Tail Risk ETF

ρ -0.36beyond mkt -0.03holdout -0.26stable 100%robust

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

ρ -0.47beyond mkt -0.03holdout -0.44stable 100%robust

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

ρ -0.38beyond mkt +0.02holdout -0.27stable 100%robust

VIXM ProShares VIX Mid-Term Futures ETF

ρ -0.34beyond mkt +0.01holdout -0.17stable 88%moderate

Weekly, not daily

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

VNOM Viper Energy, Inc. Class A Common Stock

horizon 10dρ +0.41holdout +0.28stable 75%robust

UPBD Upbound Group, Inc. Common Stock

horizon 10dρ +0.39holdout +0.06stable 75%moderate

Changed this quarter

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

EBIZ Global X Funds Global X E-commerce ETF

Δ -0.71recent -0.38prior +0.33beyond mkt +0.09

BINV Brandes International ETF

Δ -0.70recent -0.38prior +0.32beyond mkt +0.02

XRT State Street SPDR S&P Retail ETF

Δ -0.70recent -0.32prior +0.38beyond mkt +0.01

BKE The Buckle, Inc.

Δ -0.69recent -0.40prior +0.30beyond mkt +0.02

VIPS Vipshop Holdings Limited

Δ -0.66recent -0.44prior +0.23beyond mkt +0.05

IBUY Amplify Online Retail ETF

Δ -0.66recent -0.29prior +0.37beyond mkt +0.10