FIDEX vs. NBST

Last updated Jun 4, 2026

FIDEX (Fidelity SAI Sustainable U.S. Equity Fund) is Large Cap Blend Equities fund actively managed by Fidelity, while NBST (Newbury Street Acquisition Corporation) is a stock. Over the past 3 years, FIDEX returned 20.90%/yr vs 2.22%/yr for NBST. At a correlation of -0.01, they often move in opposite directions.

Performance

FIDEX vs. NBST - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity SAI Sustainable U.S. Equity Fund (FIDEX) and Newbury Street Acquisition Corporation (NBST). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FIDEX achieves a 13.79% return, which is significantly higher than NBST's -45.00% return.

FIDEX

• 1D: 0.42%
• 1M: 6.15%
• YTD: 13.79%
• 6M: 13.98%
• 1Y: 32.88%
• 3Y*: 20.90%
• 5Y*: —
• 10Y*: —

NBST

• 1D: 0.00%
• 1M: 0.00%
• YTD: -45.00%
• 6M: -45.00%
• 1Y: -11.93%
• 3Y*: 2.22%
• 5Y*: 2.70%
• 10Y*: —

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

FIDEX vs. NBST - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022
FIDEX Fidelity SAI Sustainable U.S. Equity Fund	13.79%	15.80%	21.44%	24.99%	-8.88%
NBST Newbury Street Acquisition Corporation	-45.00%	72.56%	8.93%	6.29%	2.35%

Correlation

The correlation between FIDEX and NBST is 0.12, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.12
Correlation (3Y) Calculated over the trailing 3-year period	-0.00
Correlation (All Time) Calculated using the full available price history since Apr 26, 2022	-0.01

The correlation between FIDEX and NBST shifts across timeframes, from -0.01 (all time) to 0.12 (1 year), reflecting how their relationship changes across market environments.

Return for Risk

FIDEX vs. NBST — Risk / Return Rank

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

FIDEX

FIDEX Risk / Return Rank: 70
FIDEX Sharpe Ratio Rank: 69
FIDEX Sortino Ratio Rank: 63
FIDEX Omega Ratio Rank: 60
FIDEX Calmar Ratio Rank: 73
FIDEX Martin Ratio Rank: 84

NBST

NBST Risk / Return Rank: 51
NBST Sharpe Ratio Rank: 37
NBST Sortino Ratio Rank: 55
NBST Omega Ratio Rank: 96
NBST Calmar Ratio Rank: 33
NBST Martin Ratio Rank: 33

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.

FIDEX vs. NBST - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity SAI Sustainable U.S. Equity Fund (FIDEX) and Newbury Street Acquisition Corporation (NBST). 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.

	FIDEX	NBST	Difference
Sharpe ratio: Return per unit of total volatility	2.43	-0.08	+2.52
Sortino ratio: Return per unit of downside risk	3.33	1.04	+2.29
Omega ratio: Gain probability vs. loss probability	1.43	1.61	-0.18
Calmar ratio: Return relative to maximum drawdown	3.33	-0.24	+3.57
Martin ratio: Return relative to average drawdown	15.95	-0.44	+16.38
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FIDEX vs. NBST - Sharpe Ratio Comparison

The current FIDEX Sharpe Ratio is 2.43, which is higher than the NBST Sharpe Ratio of -0.08. The chart below compares the historical Sharpe Ratios of FIDEX and NBST, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	FIDEX	NBST	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.43	-0.08	+2.52
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.04	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.86	0.03	+0.83

Drawdowns

FIDEX vs. NBST - Drawdown Comparison

The maximum FIDEX drawdown since its inception was -21.90%, smaller than the maximum NBST drawdown of -49.90%. Use the drawdown chart below to compare losses from any high point for FIDEX and NBST.

Drawdown Indicators

	FIDEX	NBST	Difference
Max Drawdown Largest peak-to-trough decline	-21.90%	-49.90%	+28.00%
Max Drawdown (1Y) Largest decline over 1 year	-10.13%	-49.90%	+39.77%
Max Drawdown (3Y) Largest decline over 3 years	-21.90%	-49.90%	+28.00%
Max Drawdown (5Y) Largest decline over 5 years	—	-49.90%	—
Current Drawdown Current decline from peak	0.00%	-45.00%	+45.00%
Average Drawdown Average peak-to-trough decline	-3.70%	-5.06%	+1.36%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.11%	27.43%	-25.32%

Volatility

FIDEX vs. NBST - Volatility Comparison

Fidelity SAI Sustainable U.S. Equity Fund (FIDEX) has a higher volatility of 3.92% compared to Newbury Street Acquisition Corporation (NBST) at 0.00%. This indicates that FIDEX's price experiences larger fluctuations and is considered to be riskier than NBST based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FIDEX	NBST	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.92%	0.00%	+3.92%
Volatility (6M) Calculated over the trailing 6-month period	10.80%	79.88%	-69.08%
Volatility (1Y) Calculated over the trailing 1-year period	13.86%	142.60%	-128.74%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	18.47%	64.25%	-45.78%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.47%	63.67%	-45.20%

Dividends

FIDEX vs. NBST - Dividend Comparison

FIDEX's dividend yield for the trailing twelve months is around 1.38%, while NBST has not paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022
FIDEX Fidelity SAI Sustainable U.S. Equity Fund	1.38%	1.64%	1.87%	0.46%	0.63%
NBST Newbury Street Acquisition Corporation	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both FIDEX and NBST in my portfolio?

FIDEX and NBST have a correlation of 0.12, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FIDEX or NBST?

FIDEX has higher volatility (3.92%) compared to NBST (0.00%). In terms of maximum drawdown, FIDEX dropped -21.90% vs NBST's -49.90%.

Which has better risk-adjusted returns?

FIDEX currently has the higher Sharpe Ratio (2.43 vs -0.08), 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.