COCH vs QTI: Correlation
Measured on weekly returns over the past three years, Envoy Medical, Inc. (COCH) and QT Imaging Holdings, Inc. (QTI) carry a correlation of -0.28, a negative link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are COCH and QTI?
On 3 years of weekly data the COCH/QTI correlation comes out at -0.28, negative, meaning they tend to move in opposite directions. The link has tightened recently: the 1-year correlation (0.20) runs above the 3-year figure (-0.28). The 5-year figure is -0.28, and annualized covariance runs at -7759.2 %².
QTI is close to the least connected end of COCH's tracked universe, ranking #9 of 10. Their recent paths diverged sharply: over the last 12 months COCH outperformed by 54.1 percentage points (-37.5% for COCH against -91.6% for QTI). One caveat on sizing: COCH is 2.4 times as volatile as the other leg, so an equal-dollar split is far from equal-risk.
How is this computed?
Pearson correlation on weekly returns: ρ(A,B) = cov(rA, rB) / (σA · σB), over windows of 52, 156 and 260 weeks. Covariance is annualized (×52) and expressed in %². Full definitions on the methodology page.
COCH vs QTI: side by side
| COCH (Envoy Medical, Inc.) | QTI (QT Imaging Holdings, Inc.) | |
|---|---|---|
| 1-year return | -37.5% | -91.6% |
| 5-year return | -92.4% | -97.9% |
| Volatility (ann.) | 256.3% | 108.2% |
| Beta vs S&P 500 | 0.52 | 0.12 |
| Max drawdown (3Y) | -96.3% | -98.6% |
| Market cap | $0.1B | – |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | COCH | QTI |
|---|---|---|
| 2022 | +2.9% | +3.1% |
| 2023 | -81.9% | +7.7% |
| 2024 | -21.0% | -95.6% |
| 2025 | -53.8% | -16.7% |
| 2026 | +10.6% | -48.9% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are COCH and QTI good diversifiers for each other?
Yes. With a correlation of -0.28, COCH and QTI have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between COCH and QTI?
As of 2026-08-27, the correlation of weekly returns between COCH and QTI is -0.28 over 3 years, 0.20 over 1 year and -0.28 over 5 years.
Is QTI a good diversifier for COCH?
Yes. With a correlation of -0.28, COCH and QTI have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.28 mean?
On the −1 to +1 scale, -0.28 describes how much the two returns move together: +1 is lockstep, 0 is independence, negative values mean opposite directions. It says nothing about which performed better.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/coch-vs-qti.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/coch-vs-qti/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: COCH correlations · QTI correlations
