OKLO vs. VOOG

Last updated Jun 9, 2026

OKLO (Oklo Inc.) is a stock, while VOOG (Vanguard S&P 500 Growth ETF) is S&P 500 fund tracking the S&P 500 Growth Index. Over the past 3 years, OKLO returned 77.50%/yr vs 26.66%/yr for VOOG. At a 0.28 correlation, their price movements are largely independent.

Performance

OKLO vs. VOOG - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Oklo Inc. (OKLO) and Vanguard S&P 500 Growth ETF (VOOG). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, OKLO achieves a -17.87% return, which is significantly lower than VOOG's 10.10% return.

OKLO

• 1D: 1.46%
• 1M: -18.71%
• YTD: -17.87%
• 6M: -43.66%
• 1Y: 17.20%
• 3Y*: 77.50%
• 5Y*: —
• 10Y*: —

VOOG

• 1D: 0.65%
• 1M: -0.20%
• YTD: 10.10%
• 6M: 9.55%
• 1Y: 29.06%
• 3Y*: 26.66%
• 5Y*: 15.20%
• 10Y*: 17.80%

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

OKLO vs. VOOG - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
OKLO Oklo Inc.	-17.87%	238.01%	101.04%	6.45%	0.71%	-1.50%
VOOG Vanguard S&P 500 Growth ETF	10.10%	22.11%	35.89%	29.96%	-29.48%	12.38%

Correlation

The correlation between OKLO and VOOG is 0.49, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.49
Correlation (3Y) Calculated over the trailing 3-year period	0.38
Correlation (All Time) Calculated using the full available price history since Jul 8, 2021	0.28

Over the past year, OKLO and VOOG have become more correlated (0.49) than their long-term average of 0.28, meaning their price movements have been converging.

Return for Risk

OKLO vs. VOOG — Risk / Return Rank

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

OKLO

OKLO Risk / Return Rank: 50
OKLO Sharpe Ratio Rank: 48
OKLO Sortino Ratio Rank: 56
OKLO Omega Ratio Rank: 53
OKLO Calmar Ratio Rank: 48
OKLO Martin Ratio Rank: 47

VOOG

VOOG Risk / Return Rank: 55
VOOG Sharpe Ratio Rank: 59
VOOG Sortino Ratio Rank: 56
VOOG Omega Ratio Rank: 56
VOOG Calmar Ratio Rank: 47
VOOG Martin Ratio Rank: 55

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.

OKLO vs. VOOG - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Oklo Inc. (OKLO) and Vanguard S&P 500 Growth ETF (VOOG). 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.

	OKLO	VOOG	Difference
Sharpe ratio: Return per unit of total volatility	0.16	1.79	-1.63
Sortino ratio: Return per unit of downside risk	1.07	2.41	-1.34
Omega ratio: Gain probability vs. loss probability	1.12	1.31	-0.20
Calmar ratio: Return relative to maximum drawdown	0.23	2.13	-1.89
Martin ratio: Return relative to average drawdown	0.38	8.74	-8.36
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

OKLO vs. VOOG - Sharpe Ratio Comparison

The current OKLO Sharpe Ratio is 0.16, which is lower than the VOOG Sharpe Ratio of 1.79. The chart below compares the historical Sharpe Ratios of OKLO and VOOG, 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

	OKLO	VOOG	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.16	1.79	-1.63
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.72	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.86	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.51	0.89	-0.39

Drawdowns

OKLO vs. VOOG - Drawdown Comparison

The maximum OKLO drawdown since its inception was -73.83%, which is greater than VOOG's maximum drawdown of -32.73%. Use the drawdown chart below to compare losses from any high point for OKLO and VOOG.

Drawdown Indicators

	OKLO	VOOG	Difference
Max Drawdown Largest peak-to-trough decline	-73.83%	-32.73%	-41.10%
Max Drawdown (1Y) Largest decline over 1 year	-73.83%	-13.71%	-60.12%
Max Drawdown (3Y) Largest decline over 3 years	-73.83%	-22.18%	-51.65%
Max Drawdown (5Y) Largest decline over 5 years	—	-32.73%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-32.73%	—
Current Drawdown Current decline from peak	-66.15%	-4.28%	-61.87%
Average Drawdown Average peak-to-trough decline	-17.98%	-4.97%	-13.01%
Ulcer Index Depth and duration of drawdowns from previous peaks	44.99%	3.33%	+41.66%

Volatility

OKLO vs. VOOG - Volatility Comparison

Oklo Inc. (OKLO) has a higher volatility of 28.53% compared to Vanguard S&P 500 Growth ETF (VOOG) at 5.61%. This indicates that OKLO's price experiences larger fluctuations and is considered to be riskier than VOOG based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OKLO	VOOG	Difference
Volatility (1M) Calculated over the trailing 1-month period	28.53%	5.61%	+22.92%
Volatility (6M) Calculated over the trailing 6-month period	69.37%	13.04%	+56.33%
Volatility (1Y) Calculated over the trailing 1-year period	106.14%	16.31%	+89.83%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	85.95%	21.25%	+64.70%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	85.95%	20.77%	+65.18%

Dividends

OKLO vs. VOOG - Dividend Comparison

OKLO has not paid dividends to shareholders, while VOOG's dividend yield for the trailing twelve months is around 0.45%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
OKLO Oklo 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%
VOOG Vanguard S&P 500 Growth ETF	0.45%	0.49%	0.49%	1.12%	0.93%	0.53%	0.88%	1.26%	1.34%	1.32%	1.47%	1.56%

Frequently Asked Questions

Can I hold both OKLO and VOOG in my portfolio?

OKLO and VOOG have a correlation of 0.49, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, OKLO or VOOG?

OKLO has higher volatility (28.53%) compared to VOOG (5.61%). In terms of maximum drawdown, OKLO dropped -73.83% vs VOOG's -32.73%.

Which has better risk-adjusted returns?

VOOG currently has the higher Sharpe Ratio (1.79 vs 0.16), 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.