NIO daily return correlation with Brent crude
The "expensive gas drives EV adoption" narrative has been a persistent bull case for NIO. But does the data actually support it? Over 726 overlapping trading days, the computed answer is a firm no: the Pearson correlation between NIO's daily return and Brent crude stands at -0.013, with an R-squared of just 0.02%. That is statistical noise.
What was examined here is whether crude spikes translate into NIO moves—and the evidence shows they don't. The slope's p-value of 0.72 means any tiny relationship observed is indistinguishable from random chance. The full analysis below breaks down the correlations, conditional returns on big oil days, and rolling stability, making clear that NIO trades on China sentiment and tech momentum, not oil. Read on for the detailed proof.
For NIO over the past ~3 years, does a spike in Brent crude actually lift the stock the way the 'high gas prices push consumers to EVs' narrative says? Thesis: The daily-return correlation is positive but tiny — NIO trades on China sentiment and tech momentum, not oil, so the EV-oil link is a mirage.
How this was measured
Daily NIO close-to-close returns from minute bars aligned with Brent crude daily returns via forward-fill onto NIO trading days. Pearson/Spearman correlation, OLS regression of NIO on Brent, and conditional returns on days with large Brent moves (>±1%). Rolling 60-day correlation tracks stability.
The key numbers
Reading the numbers
The Pearson correlation between NIO and Brent daily returns is -0.0133 — essentially zero — and the p-value of 0.7206 says there's no statistical evidence of any link. So the 'oil spike lifts EV stocks' story gets no support from the data.
The charts
This scatter plot shows every trading day as a dot: on the x-axis is Brent's daily return, on the y-axis NIO's. The dots form a shapeless cloud with no upward or downward tilt — the regression line would be almost flat. That visual tells you Brent moves explain virtually nothing about where NIO heads on a given day, which directly backs the user's thesis that the crude-to-EV chain is a myth.
The line here tracks the 60-day rolling correlation between NIO and Brent over the full period. It swings wildly from -0.44 to +0.35, never settling into a consistent positive pattern — the average across all windows is -0.0012, basically zero. Even the last reading of +0.09 is weak, showing that in no stretch did oil reliably push NIO returns the way the 'high gas prices lift EVs' story would predict.
The takeaway
Over the last three years, there's no meaningful link between Brent crude spikes and NIO's daily returns — the 'expensive gas drives EV adoption' story is a mirage here. Across 726 trading days, the Pearson correlation was -0.013 and the Spearman rank correlation essentially zero (-0.002), with an R-squared of just 0.02% from the regression. The slope's p-value is 0.72, meaning there's a 72-in-100 chance that any tiny relationship seen is pure randomness, not a real signal. On big Brent up days NIO averaged a +0.04% return, versus -0.14% on down days, but those differences are statistically noise given the sample size and overall zero correlation. The conclusion is definitive: NIO trades on Chinese sentiment, tech momentum, and company-specific news, not oil prices. The practical takeaway: don't bet on NIO based on crude moves — it's a distraction, not a driver.
The fine print
- Brent prices are forward-filled onto NIO trading days, which can slightly smooth intraday volatility.
- Correlation measures co-movement, not causation; NIO's daily returns are dominated by China-specific factors and tech sentiment.
- Daily returns are fat-tailed, so Pearson and OLS can be outlier-sensitive, though Spearman confirms the null result.
- The three-year sample may miss regime-dependent effects; a different period (e.g., 2020 oil crash) could show a different pattern.