BLCO vs QQQ: Correlation
How closely do Bausch + Lomb Corporation (BLCO) and Invesco QQQ Trust (QQQ) trade together? Their weekly returns over three years give a correlation of 0.18, which is weak.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BLCO and QQQ?
Across a 3-year window, the weekly returns of BLCO and QQQ correlate at 0.18, weak. Recent behaviour matches the longer record: 0.16 over 1 year against 0.18 over 3. Stretching to 5 years gives 0.24, with an annualized covariance of 137.8 %².
QQQ is close to the least connected end of BLCO's tracked universe, ranking #8 of 11. The trailing year gives QQQ the advantage: +17.7% versus +26.3%, a 8.6-point spread. Risk is not evenly split, since BLCO carries 2.0 times the volatility of the other side.
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.
BLCO vs QQQ: side by side
| BLCO (Bausch + Lomb Corporation) | QQQ (Invesco QQQ Trust) | |
|---|---|---|
| 1-year return | +17.7% | +26.3% |
| 5-year return | -14.4% | +95.4% |
| Volatility (ann.) | 39.6% | 19.6% |
| Beta vs S&P 500 | 0.82 | 1.28 |
| Max drawdown (3Y) | -47.9% | -22.8% |
| Market cap | $6.1B | – |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.44% |
| Expense ratio | – | 0.18% |
| Assets under management | – | $452.8B |
| Sector / category | US Listed | ETF · US Growth & Tech |
QQQ is a Large Growth fund from Invesco: $452.8B under management, 104 holdings, a 0.18% expense ratio, a 0.44% trailing dividend yield.
Year-by-year returns
| Year | BLCO | QQQ |
|---|---|---|
| 2022 | – | -32.6% |
| 2023 | +10.0% | +54.9% |
| 2024 | +5.9% | +25.6% |
| 2025 | -5.4% | +20.8% |
| 2026 | +0.3% | +17.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BLCO and QQQ good diversifiers for each other?
Yes. With a correlation of 0.18, BLCO and QQQ have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between BLCO and QQQ?
Using weekly returns as of 2026-08-27: 0.18 over 3 years, with 0.16 over the last year and 0.24 over 5 years.
Is QQQ a good diversifier for BLCO?
Yes. With a correlation of 0.18, BLCO and QQQ have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of 0.18 mean?
Correlation ranges from −1 to +1. Values near +1 mean two assets move together, near 0 that they move independently, and negative values that they tend to move in opposite directions. It measures co-movement, not performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/blco-vs-qqq.json
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[](https://www.pairbook.io/pair/blco-vs-qqq/)
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Related comparisons
Hubs: BLCO correlations · QQQ correlations
