IBIO vs STOK: Correlation
How closely do iBio, Inc. (IBIO) and Stoke Therapeutics, Inc. (STOK) trade together? Their weekly returns over three years give a correlation of 0.62, which is strong.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are IBIO and STOK?
On 3 years of weekly data the IBIO/STOK correlation comes out at 0.62, strong. Lately the two have drifted apart, with the 1-year correlation at 0.22 versus 0.62 over 3 years. The 5-year figure is 0.48, and annualized covariance runs at 11268.0 %².
In IBIO's tracked universe of 13 assets, STOK sits right near the top at #3. Neither side won the trailing year by much: +72.8% against +68.9%. Note the risk asymmetry: IBIO runs 2.1 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.
IBIO vs STOK: side by side
| IBIO (iBio, Inc.) | STOK (Stoke Therapeutics, Inc.) | |
|---|---|---|
| 1-year return | +72.8% | +68.9% |
| 5-year return | -99.8% | +23.8% |
| Volatility (ann.) | 196.4% | 93.2% |
| Beta vs S&P 500 | 1.36 | 1.80 |
| Max drawdown (3Y) | -92.9% | -66.3% |
| Market cap | $0.1B | $2.1B |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | IBIO | STOK |
|---|---|---|
| 2022 | -96.8% | -61.5% |
| 2023 | -84.4% | -43.0% |
| 2024 | +78.8% | +109.7% |
| 2025 | -21.2% | +187.8% |
| 2026 | -27.5% | +2.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are IBIO and STOK good diversifiers for each other?
Only partially. A correlation of 0.62 means IBIO and STOK share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
FAQ
What is the correlation between IBIO and STOK?
As of 2026-08-27, the correlation of weekly returns between IBIO and STOK is 0.62 over 3 years, 0.22 over 1 year and 0.48 over 5 years.
Is STOK a good diversifier for IBIO?
Only partially. A correlation of 0.62 means IBIO and STOK share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
What does a correlation of 0.62 mean?
A reading of 0.62 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
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Related comparisons
Hubs: IBIO correlations · STOK correlations
