NRDY vs SXTC: Correlation
Measured on weekly returns over the past three years, Nerdy Inc. (NRDY) and China SXT Pharmaceuticals, Inc. - Class A (SXTC) carry a correlation of 0.98, a very strong link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are NRDY and SXTC?
On 3 years of weekly data the NRDY/SXTC correlation comes out at 0.98, very strong, meaning they move nearly in lockstep. Recent behaviour matches the longer record: 0.99 over 1 year against 0.98 over 3. The 5-year figure is 0.98, and annualized covariance runs at 7519786.7 %².
Among the 10 assets we track against NRDY, SXTC ranks #4 by 3-year correlation. The last year tells two different stories: NRDY led by 759.4 percentage points, +661.0% for NRDY against -98.4% for SXTC. Note the risk asymmetry: SXTC runs 6.4 times the annualized volatility of the other leg, so equal-weighting the two is not an equal-risk position.
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.
NRDY vs SXTC: side by side
| NRDY (Nerdy Inc.) | SXTC (China SXT Pharmaceuticals, Inc. - Class A) | |
|---|---|---|
| 1-year return | +661.0% | -98.4% |
| 5-year return | +3.8% | -99.9% |
| Volatility (ann.) | 1097.1% | 6970.7% |
| Beta vs S&P 500 | 2.74 | 6.97 |
| Max drawdown (3Y) | -94.2% | -100.0% |
| Market cap | $0.7B | – |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | NRDY | SXTC |
|---|---|---|
| 2022 | -50.0% | -16.6% |
| 2023 | +52.4% | -70.7% |
| 2024 | -52.8% | -87.2% |
| 2025 | -35.8% | +215.0% |
| 2026 | +895.2% | -98.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are NRDY and SXTC good diversifiers for each other?
No: a correlation of 0.98 means NRDY and SXTC tend to fall together, which is precisely when diversification is supposed to help.
FAQ
What is the correlation between NRDY and SXTC?
The NRDY/SXTC correlation stands at 0.98 on a 3-year window (1 year: 0.99, 5 years: 0.98), computed from weekly returns as of 2026-08-27.
Is SXTC a good diversifier for NRDY?
No: a correlation of 0.98 means NRDY and SXTC tend to fall together, which is precisely when diversification is supposed to help.
What does a correlation of 0.98 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/nrdy-vs-sxtc.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/nrdy-vs-sxtc/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: NRDY correlations · SXTC correlations
