BGSF vs PTGX: Correlation
BGSF, Inc. (BGSF) and Protagonist Therapeutics, Inc. (PTGX) show a negative relationship: their 3-year correlation of weekly returns is -0.23.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BGSF and PTGX?
Across a 3-year window, the weekly returns of BGSF and PTGX correlate at -0.23, negative, meaning they tend to move in opposite directions. Recent behaviour matches the longer record: -0.23 over 1 year against -0.23 over 3. Stretching to 5 years gives -0.11, with an annualized covariance of -648.7 %².
Among the 12 assets we track against BGSF, PTGX sits near the bottom by co-movement, at rank #11. Correlation aside, the last 12 months split them widely, with PTGX ahead by 123.6 points (+19.8% versus +143.4%).
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.
BGSF vs PTGX: side by side
| BGSF (BGSF, Inc.) | PTGX (Protagonist Therapeutics, Inc.) | |
|---|---|---|
| 1-year return | +19.8% | +143.4% |
| 5-year return | -36.0% | +219.7% |
| Volatility (ann.) | 54.3% | 53.0% |
| Beta vs S&P 500 | 0.47 | 0.49 |
| Max drawdown (3Y) | -71.9% | -31.6% |
| Market cap | $0.1B | $9.7B |
| P/E (trailing) | – | 145.1 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | BGSF | PTGX |
|---|---|---|
| 2022 | +11.7% | -68.1% |
| 2023 | -35.1% | +110.2% |
| 2024 | -43.4% | +68.3% |
| 2025 | +23.0% | +126.3% |
| 2026 | +15.8% | +71.2% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BGSF and PTGX good diversifiers for each other?
By historical standards, yes. A correlation of -0.23 means the two rarely move for the same reasons.
FAQ
What is the correlation between BGSF and PTGX?
The BGSF/PTGX correlation stands at -0.23 on a 3-year window (1 year: -0.23, 5 years: -0.11), computed from weekly returns as of 2026-08-27.
Is PTGX a good diversifier for BGSF?
By historical standards, yes. A correlation of -0.23 means the two rarely move for the same reasons.
What does a correlation of -0.23 mean?
A reading of -0.23 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: BGSF correlations · PTGX correlations
