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PTC vs COST · data through Oct 2, 2026

PTC and COST clearly differ on 4 of 19 forces. The widest gap is short-term rates: in weeks when the 2-year Treasury yield rose 0.25 percentage points, PTC typically moved −2.2% and COST +2.1%.

PTCCOSTBars: 90% ranges. Hollow: could not be told apart from zero.Same figures in the table below.
Economic forcePTCPTC Inc.COSTCostco
Interest ratesIn weeks when the 10-year Treasury yield rose 0.25 percentage points−0.60%−1.6% to +0.39%Not distinguishable from zero−1.4%−2.8% to −0.08%Tentative
Inflation expectationsIn weeks when 10-year inflation expectations rose 0.25 percentage points+1.2%−1.5% to +3.9%Not distinguishable from zero+1.4%−1.0% to +3.8%Not distinguishable from zero
U.S. dollarIn weeks when the trade-weighted U.S. dollar rose 2%+1.6%−0.15% to +3.4%Not distinguishable from zero+1.9%+0.63% to +3.3%Tentative
Oil and energyIn weeks when the price of oil rose 10%+0.21%−0.72% to +1.1%Not distinguishable from zero+0.21%−0.47% to +0.88%Not distinguishable from zero
Credit spreadsIn weeks when corporate credit spreads widened 0.25 percentage points+1.2%−1.5% to +3.9%Not distinguishable from zero+0.50%−1.7% to +2.7%Not distinguishable from zero
Short-term ratesIn weeks when the 2-year Treasury yield rose 0.25 percentage pointsClear difference−2.2%−4.4% to +0.07%Not distinguishable from zero+2.1%+0.50% to +3.7%Tentative
Market volatilityIn weeks when market volatility (the VIX) rose 5 points+0.88%−0.18% to +1.9%Not distinguishable from zero+0.13%−0.75% to +1.0%Not distinguishable from zero
Mortgage ratesIn weeks when the 30-year mortgage rate rose 0.25 percentage points+0.28%−1.0% to +1.6%Not distinguishable from zero−1.0%−1.9% to −0.10%Tentative
GoldIn weeks when the price of gold rose 5%+0.94%+0.09% to +1.8%Tentative+0.66%−0.17% to +1.5%Not distinguishable from zero
CopperIn weeks when the price of copper rose 5%−0.29%−1.1% to +0.53%Not distinguishable from zero−0.26%−0.82% to +0.30%Not distinguishable from zero
Natural gasIn weeks when the U.S. natural gas price (Henry Hub) rose 10%Clear difference−0.01%−0.02% to +0.01%Not distinguishable from zero+0.03%+0.02% to +0.04%Clear
BitcoinIn weeks when the price of bitcoin rose 10%Clear difference+0.62%+0.01% to +1.2%Tentative−0.45%−0.87% to −0.04%Tentative
Small vs large companiesIn weeks when small companies beat large ones by 1 percentage point−0.16%−0.47% to +0.16%Not distinguishable from zero−0.05%−0.37% to +0.27%Not distinguishable from zero
Value vs growthIn weeks when value stocks beat growth stocks by 1 percentage point−0.16%−0.42% to +0.10%Not distinguishable from zero+0.02%−0.25% to +0.29%Not distinguishable from zero
MomentumIn weeks when recent winners beat the stock market by 1 percentage pointClear difference−1.0%−1.5% to −0.46%Clear+0.14%−0.14% to +0.42%Not distinguishable from zero
EuroIn weeks when the euro rose 2% against the U.S. dollar+2.0%−0.89% to +4.9%Not distinguishable from zero−0.69%−2.6% to +1.2%Not distinguishable from zero
Japanese yenIn weeks when the yen rose 2% against the U.S. dollar+0.04%−1.4% to +1.5%Not distinguishable from zero+0.33%−0.38% to +1.0%Not distinguishable from zero
Emerging marketsIn weeks when emerging-market stocks beat the S&P 500 by 1 percentage point−0.46%−0.89% to −0.03%Tentative−0.36%−0.61% to −0.12%Tentative
ChinaIn weeks when Chinese stocks beat other emerging markets by 1 percentage point+0.22%+0.02% to +0.41%Tentative−0.04%−0.21% to +0.13%Not distinguishable from zero
Each figure is the stock's typical move in a week when the force moved by the stated amount, after accounting for the stock market, with its 90% range beneath. Grey figures could not be told apart from zero. A row is marked a clear difference only when the two 90% ranges do not overlap.

This describes the past, and it is not a forecast. Relationships change, and nothing here is a recommendation to buy, sell or hold any security.

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