BFLY vs. FXAIX
BFLY (Butterfly Network, Inc.) is a stock, while FXAIX (Fidelity 500 Index Fund) is S&P 500 fund tracking the S&P 500 Index. Over the past 5 years, BFLY returned -10.90%/yr vs 13.60%/yr for FXAIX. At a 0.43 correlation, their price movements are largely independent.
Performance
BFLY vs. FXAIX - Performance Comparison
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Returns By Period
In the year-to-date period, BFLY achieves a 101.84% return, which is significantly higher than FXAIX's 9.79% return.
BFLY
- 1D
- 5.50%
- 1M
- 71.59%
- YTD
- 101.84%
- 6M
- 94.18%
- 1Y
- 274.15%
- 3Y*
- 54.00%
- 5Y*
- -10.90%
- 10Y*
- —
FXAIX
- 1D
- -0.37%
- 1M
- 0.10%
- YTD
- 9.79%
- 6M
- 8.79%
- 1Y
- 25.51%
- 3Y*
- 21.39%
- 5Y*
- 13.60%
- 10Y*
- 15.80%
BFLY vs. FXAIX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | |
|---|---|---|---|---|---|---|---|
BFLY Butterfly Network, Inc. | 101.84% | 21.79% | 188.89% | -56.10% | -63.23% | -66.20% | 94.78% |
FXAIX Fidelity 500 Index Fund | 9.79% | 17.84% | 25.01% | 26.29% | -18.14% | 28.71% | 18.84% |
Correlation
The correlation between BFLY and FXAIX is 0.46, which is low. Their price movements are largely independent, making them effective diversification partners.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.46 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.43 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.46 |
Correlation (All Time) Calculated using the full available price history since Jul 13, 2020 | 0.43 |
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Return for Risk
BFLY vs. FXAIX — Risk / Return Rank
BFLY
FXAIX
BFLY vs. FXAIX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Butterfly Network, Inc. (BFLY) and Fidelity 500 Index Fund (FXAIX). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.
Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.
| BFLY | FXAIX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.09 | ||
| Sortino ratioReturn per unit of downside risk | +0.44 | ||
| Omega ratioGain probability vs. loss probability | 1.41 | 1.39 | +0.02 |
| Calmar ratioReturn relative to maximum drawdown | 6.80 | 3.02 | +3.78 |
| Martin ratioReturn relative to average drawdown | 14.20 | 13.62 | +0.58 |
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Drawdowns
BFLY vs. FXAIX - Drawdown Comparison
The maximum BFLY drawdown since its inception was -97.40%, which is greater than FXAIX's maximum drawdown of -33.79%. Use the drawdown chart below to compare losses from any high point for BFLY and FXAIX.
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Drawdown Indicators
| BFLY | FXAIX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -97.40% | -33.79% | -63.61% |
Max Drawdown (1Y)Largest decline over 1 year | -40.61% | -8.89% | -31.72% |
Max Drawdown (3Y)Largest decline over 3 years | -73.20% | -18.76% | -54.44% |
Max Drawdown (5Y)Largest decline over 5 years | -95.13% | -24.50% | -70.63% |
Max Drawdown (10Y)Largest decline over 10 years | — | -33.79% | — |
Current DrawdownCurrent decline from peak | -71.74% | -1.72% | -70.02% |
Average DrawdownAverage peak-to-trough decline | -75.95% | -3.79% | -72.16% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 19.44% | 1.97% | +17.47% |
Volatility
BFLY vs. FXAIX - Volatility Comparison
Butterfly Network, Inc. (BFLY) has a higher volatility of 54.98% compared to Fidelity 500 Index Fund (FXAIX) at 4.68%. This indicates that BFLY's price experiences larger fluctuations and is considered to be riskier than FXAIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| BFLY | FXAIX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 54.98% | 4.68% | +50.30% |
Volatility (6M)Calculated over the trailing 6-month period | 86.41% | 9.84% | +76.57% |
Volatility (1Y)Calculated over the trailing 1-year period | 123.24% | 12.50% | +110.74% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 101.55% | 17.00% | +84.55% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 97.85% | 18.12% | +79.73% |
Dividends
BFLY vs. FXAIX - Dividend Comparison
BFLY has not paid dividends to shareholders, while FXAIX's dividend yield for the trailing twelve months is around 1.04%.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
BFLY Butterfly Network, Inc. | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
FXAIX Fidelity 500 Index Fund | 1.04% | 1.11% | 1.25% | 1.45% | 1.69% | 1.22% | 1.60% | 2.06% | 2.72% | 1.97% | 2.52% | 2.83% |
Frequently Asked Questions
BFLY and FXAIX have a correlation of 0.46, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
BFLY has higher volatility (54.98%) compared to FXAIX (4.68%). In terms of maximum drawdown, BFLY dropped -97.40% vs FXAIX's -33.79%.
BFLY currently has the higher Sharpe Ratio (2.24 vs 2.15), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.
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