SPIR vs. BIL

Last updated Jul 18, 2026

SPIR (Spire Global, Inc.) is a stock, while BIL (SPDR Bloomberg 1-3 Month T-Bill ETF) is Government Bonds fund tracking the Bloomberg 1-3 Month U.S. Treasury Bill Index. Over the past 5 years, SPIR returned -31.42%/yr vs 3.50%/yr for BIL. At a 0.01 correlation, their price movements are largely independent.

Performance

SPIR vs. BIL - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Spire Global, Inc. (SPIR) and SPDR Bloomberg 1-3 Month T-Bill ETF (BIL). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SPIR achieves a 61.87% return, which is significantly higher than BIL's 1.94% return.

SPIR

• 1D: -0.08%
• 1M: -33.11%
• 6M: 0.25%
• YTD: 61.87%
• 1Y: -2.80%
• 3Y*: 29.09%
• 5Y*: -31.42%
• 10Y*: —

BIL

• 1D: 0.02%
• 1M: 0.31%
• 6M: 1.76%
• YTD: 1.94%
• 1Y: 3.83%
• 3Y*: 4.59%
• 5Y*: 3.50%
• 10Y*: 2.23%

*Multi-year figures are annualized to reflect compound growth (CAGR)

SPIR vs. BIL - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020
SPIR Spire Global, Inc.	61.87%	-46.70%	79.92%	1.82%	-71.60%	-66.23%	5.37%
BIL SPDR Bloomberg 1-3 Month T-Bill ETF	1.94%	4.15%	5.19%	4.94%	1.40%	-0.10%	-0.01%

Correlation

The correlation between SPIR and BIL is -0.05, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	-0.05
Correlation (3Y) Calculated over the trailing 3-year period	-0.04
Correlation (5Y) Calculated over the trailing 5-year period	0.01
Correlation (All Time) Calculated using the full available price history since Nov 3, 2020	0.01

Return for Risk

SPIR vs. BIL — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

SPIR

SPIR Risk / Return Rank: 47
SPIR Sharpe Ratio Rank: 44
SPIR Sortino Ratio Rank: 53
SPIR Omega Ratio Rank: 51
SPIR Calmar Ratio Rank: 43
SPIR Martin Ratio Rank: 43

BIL

BIL Risk / Return Rank: 100
BIL Sharpe Ratio Rank: 100
BIL Sortino Ratio Rank: 100
BIL Omega Ratio Rank: 100
BIL Calmar Ratio Rank: 100
BIL Martin Ratio Rank: 100

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

SPIR vs. BIL - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Spire Global, Inc. (SPIR) and SPDR Bloomberg 1-3 Month T-Bill ETF (BIL). 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.

	SPIR	BIL	Difference
Sharpe ratio: Return per unit of total volatility	-0.03	19.17	-19.20
Sortino ratio: Return per unit of downside risk	0.74	154.03	-153.29
Omega ratio: Gain probability vs. loss probability	1.09	69.75	-68.66
Calmar ratio: Return relative to maximum drawdown	-0.05	351.35	-351.40
Martin ratio: Return relative to average drawdown	-0.10	2,491.58	-2,491.68

SPIR vs. BIL - Sharpe Ratio Comparison

The current SPIR Sharpe Ratio is -0.03, which is lower than the BIL Sharpe Ratio of 19.17. The chart below compares the historical Sharpe Ratios of SPIR and BIL, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

SPIR vs. BIL - Drawdown Comparison

The maximum SPIR drawdown since its inception was -97.74%, which is greater than BIL's maximum drawdown of -0.78%. Use the drawdown chart below to compare losses from any high point for SPIR and BIL.

Drawdown Indicators

	SPIR	BIL	Difference
Max Drawdown Largest peak-to-trough decline	-97.74%	-0.78%	-96.96%
Max Drawdown (1Y) Largest decline over 1 year	-52.35%	-0.01%	-52.34%
Max Drawdown (3Y) Largest decline over 3 years	-66.22%	-0.01%	-66.21%
Max Drawdown (5Y) Largest decline over 5 years	-97.74%	-0.08%	-97.66%
Max Drawdown (10Y) Largest decline over 10 years	—	-0.21%	—
Current Drawdown Current decline from peak	-91.78%	0.00%	-91.78%
Average Drawdown Average peak-to-trough decline	-78.11%	-0.26%	-77.85%
Ulcer Index Depth and duration of drawdowns from previous peaks	27.43%	0.00%	+27.43%

Volatility

SPIR vs. BIL - Volatility Comparison

Spire Global, Inc. (SPIR) has a higher volatility of 24.48% compared to SPDR Bloomberg 1-3 Month T-Bill ETF (BIL) at 0.07%. This indicates that SPIR's price experiences larger fluctuations and is considered to be riskier than BIL based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SPIR	BIL	Difference
Volatility (1M) Calculated over the trailing 1-month period	24.48%	0.07%	+24.41%
Volatility (6M) Calculated over the trailing 6-month period	79.92%	0.14%	+79.78%
Volatility (1Y) Calculated over the trailing 1-year period	104.24%	0.20%	+104.04%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	98.95%	0.26%	+98.69%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	92.82%	0.26%	+92.56%

Dividends

SPIR vs. BIL - Dividend Comparison

SPIR has not paid dividends to shareholders, while BIL's dividend yield for the trailing twelve months is around 3.81%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016
BIL SPDR Bloomberg 1-3 Month T-Bill ETF	3.81%	4.13%	5.03%	4.92%	1.35%	0.00%	0.30%	2.05%	1.66%	0.68%	0.07%
SPIR Spire Global, Inc.	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both SPIR and BIL in my portfolio?

SPIR and BIL have a correlation of -0.05, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, SPIR or BIL?

SPIR has higher volatility (24.48%) compared to BIL (0.07%). In terms of maximum drawdown, SPIR dropped -97.74% vs BIL's -0.78%.

Which has better risk-adjusted returns?

BIL currently has the higher Sharpe Ratio (19.17 vs -0.03), 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.