BGGSX vs. SPY

Last updated Jul 14, 2026

BGGSX (Baillie Gifford U.S. Equity Growth Fund) and SPY (State Street SPDR S&P 500 ETF) are both funds - BGGSX is a Large Cap Growth Equities fund managed by Baillie Gifford Funds, while SPY is a S&P 500 fund tracking the S&P 500 Index. Over the past 5 years, BGGSX returned -5.30%/yr vs 12.94%/yr for SPY. A 0.73 correlation means they provide meaningful diversification when combined. BGGSX charges 0.75%/yr vs 0.09%/yr for SPY.

Performance

BGGSX vs. SPY - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Baillie Gifford U.S. Equity Growth Fund (BGGSX) and State Street SPDR S&P 500 ETF (SPY). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BGGSX achieves a -1.51% return, which is significantly lower than SPY's 10.45% return.

BGGSX

• 1D: -0.35%
• 1M: 9.00%
• 6M: -2.41%
• YTD: -1.51%
• 1Y: -1.51%
• 3Y*: 14.71%
• 5Y*: -5.30%
• 10Y*: —

SPY

• 1D: -0.77%
• 1M: 1.26%
• 6M: 8.34%
• YTD: 10.45%
• 1Y: 21.46%
• 3Y*: 20.07%
• 5Y*: 12.94%
• 10Y*: 15.08%

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

BGGSX vs. SPY - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BGGSX Baillie Gifford U.S. Equity Growth Fund	-1.51%	10.25%	30.44%	45.93%	-52.50%	-11.13%	125.42%	30.00%	8.31%	16.54%
SPY State Street SPDR S&P 500 ETF	10.45%	17.72%	24.89%	26.18%	-18.18%	28.73%	18.33%	31.22%	-4.57%	13.52%

Correlation

The correlation between BGGSX and SPY is 0.73, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.73
Correlation (3Y) Calculated over the trailing 3-year period	0.78
Correlation (5Y) Calculated over the trailing 5-year period	0.76
Correlation (All Time) Calculated using the full available price history since Apr 28, 2017	0.73

The correlation between BGGSX and SPY has been stable across timeframes, ranging from 0.73 to 0.78 - a consistent structural relationship.

Return for Risk

BGGSX vs. SPY — Risk / Return Rank

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

BGGSX

BGGSX Risk / Return Rank: 3
BGGSX Sharpe Ratio Rank: 3
BGGSX Sortino Ratio Rank: 3
BGGSX Omega Ratio Rank: 3
BGGSX Calmar Ratio Rank: 3
BGGSX Martin Ratio Rank: 3

SPY

SPY Risk / Return Rank: 66
SPY Sharpe Ratio Rank: 66
SPY Sortino Ratio Rank: 64
SPY Omega Ratio Rank: 65
SPY Calmar Ratio Rank: 61
SPY Martin Ratio Rank: 72

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.

BGGSX vs. SPY - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Baillie Gifford U.S. Equity Growth Fund (BGGSX) and State Street SPDR S&P 500 ETF (SPY). 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.

	BGGSX	SPY	Difference
Sharpe ratio: Return per unit of total volatility	-0.12	1.71	-1.84
Sortino ratio: Return per unit of downside risk	-0.01	2.37	-2.38
Omega ratio: Gain probability vs. loss probability	1.00	1.31	-0.31
Calmar ratio: Return relative to maximum drawdown	-0.10	2.43	-2.53
Martin ratio: Return relative to average drawdown	-0.21	10.57	-10.79

BGGSX vs. SPY - Sharpe Ratio Comparison

The current BGGSX Sharpe Ratio is -0.12, which is lower than the SPY Sharpe Ratio of 1.71. The chart below compares the historical Sharpe Ratios of BGGSX and SPY, 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

BGGSX vs. SPY - Drawdown Comparison

The maximum BGGSX drawdown since its inception was -68.76%, which is greater than SPY's maximum drawdown of -55.19%. Use the drawdown chart below to compare losses from any high point for BGGSX and SPY.

Drawdown Indicators

	BGGSX	SPY	Difference
Max Drawdown Largest peak-to-trough decline	-68.76%	-55.19%	-13.57%
Max Drawdown (1Y) Largest decline over 1 year	-26.08%	-8.88%	-17.20%
Max Drawdown (3Y) Largest decline over 3 years	-30.87%	-18.76%	-12.11%
Max Drawdown (5Y) Largest decline over 5 years	-67.71%	-24.50%	-43.21%
Max Drawdown (10Y) Largest decline over 10 years	—	-33.72%	—
Current Drawdown Current decline from peak	-28.01%	-1.12%	-26.89%
Average Drawdown Average peak-to-trough decline	-25.22%	-9.02%	-16.20%
Ulcer Index Depth and duration of drawdowns from previous peaks	12.72%	2.03%	+10.69%

Volatility

BGGSX vs. SPY - Volatility Comparison

Baillie Gifford U.S. Equity Growth Fund (BGGSX) has a higher volatility of 7.70% compared to State Street SPDR S&P 500 ETF (SPY) at 4.26%. This indicates that BGGSX's price experiences larger fluctuations and is considered to be riskier than SPY based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BGGSX	SPY	Difference
Volatility (1M) Calculated over the trailing 1-month period	7.70%	4.26%	+3.44%
Volatility (6M) Calculated over the trailing 6-month period	17.75%	10.01%	+7.74%
Volatility (1Y) Calculated over the trailing 1-year period	22.55%	12.60%	+9.95%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	35.27%	17.17%	+18.10%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	32.11%	17.93%	+14.18%

BGGSX vs. SPY - Expense Ratio Comparison

BGGSX has a 0.75% expense ratio, which is higher than SPY's 0.09% expense ratio.

Dividends

BGGSX vs. SPY - Dividend Comparison

BGGSX has not paid dividends to shareholders, while SPY's dividend yield for the trailing twelve months is around 1.00%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BGGSX Baillie Gifford U.S. Equity Growth Fund	0.00%	0.00%	0.00%	0.00%	16.38%	2.61%	3.29%	1.35%	2.02%	0.00%	0.00%	0.00%
SPY State Street SPDR S&P 500 ETF	1.00%	1.07%	1.21%	1.40%	1.65%	1.20%	1.52%	1.75%	2.04%	1.80%	2.03%	2.06%

Frequently Asked Questions

Can I hold both BGGSX and SPY in my portfolio?

BGGSX and SPY have a correlation of 0.73, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BGGSX or SPY?

BGGSX has higher volatility (7.70%) compared to SPY (4.26%). In terms of maximum drawdown, BGGSX dropped -68.76% vs SPY's -55.19%.

Which has better risk-adjusted returns?

SPY currently has the higher Sharpe Ratio (1.71 vs -0.12), 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.