VIOG vs. PBW

Last updated Jun 4, 2026

VIOG (Vanguard S&P Small-Cap 600 Growth ETF) and PBW (Invesco WilderHill Clean Energy ETF) are both Small Cap Growth Equities funds - VIOG tracks the S&P SmallCap 600 Growth Index while PBW tracks the The WilderHill Clean Energy Index (AMEX). Both are passively managed. Over the past 10 years, VIOG returned 10.83%/yr vs 11.06%/yr for PBW. A 0.70 correlation means they provide meaningful diversification when combined. VIOG charges 0.15%/yr vs 0.61%/yr for PBW.

Performance

VIOG vs. PBW - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard S&P Small-Cap 600 Growth ETF (VIOG) and Invesco WilderHill Clean Energy ETF (PBW). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, VIOG achieves a 15.37% return, which is significantly lower than PBW's 48.64% return. Both investments have delivered pretty close results over the past 10 years, with VIOG having a 10.83% annualized return and PBW not far ahead at 11.06%.

VIOG

• 1D: -0.65%
• 1M: 0.86%
• YTD: 15.37%
• 6M: 13.49%
• 1Y: 26.34%
• 3Y*: 14.40%
• 5Y*: 5.47%
• 10Y*: 10.83%

PBW

• 1D: -3.49%
• 1M: 18.16%
• YTD: 48.64%
• 6M: 46.91%
• 1Y: 151.19%
• 3Y*: 8.19%
• 5Y*: -10.05%
• 10Y*: 11.06%

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

VIOG vs. PBW - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VIOG Vanguard S&P Small-Cap 600 Growth ETF	15.37%	5.40%	9.23%	16.92%	-21.14%	22.49%	19.68%	21.16%	-4.57%	14.70%
PBW Invesco WilderHill Clean Energy ETF	48.64%	53.96%	-30.77%	-20.03%	-44.55%	-29.86%	204.82%	62.58%	-14.11%	39.92%

Correlation

The correlation between VIOG and PBW is 0.61, 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	0.61
Correlation (3Y) Calculated over the trailing 3-year period	0.69
Correlation (5Y) Calculated over the trailing 5-year period	0.72
Correlation (10Y) Calculated over the trailing 10-year period	0.71
Correlation (All Time) Calculated using the full available price history since Sep 10, 2010	0.70

The correlation between VIOG and PBW shifts across timeframes, from 0.61 (1 year) to 0.72 (5 years), reflecting how their relationship changes across market environments.

VIOG vs. PBW - Sectors Allocation Comparison

Sectors	VIOG	PBW
Technology	19.7%	14.3%
Industrials	19.5%	34.3%
Healthcare	14.6%	-
Financial Services	13.7%	1.4%
Consumer Cyclical	10.9%	13.9%
Real Estate	6.6%	-
Energy	4.1%	12.3%
Consumer Defensive	3.3%	1.1%
Basic Materials	3.1%	16.4%
Communication Services	2.7%	-
Utilities	1.7%	6.3%

Return for Risk

VIOG vs. PBW — Risk / Return Rank

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

VIOG

VIOG Risk / Return Rank: 49
VIOG Sharpe Ratio Rank: 42
VIOG Sortino Ratio Rank: 45
VIOG Omega Ratio Rank: 40
VIOG Calmar Ratio Rank: 58
VIOG Martin Ratio Rank: 57

PBW

PBW Risk / Return Rank: 88
PBW Sharpe Ratio Rank: 94
PBW Sortino Ratio Rank: 86
PBW Omega Ratio Rank: 79
PBW Calmar Ratio Rank: 94
PBW Martin Ratio Rank: 88

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.

VIOG vs. PBW - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard S&P Small-Cap 600 Growth ETF (VIOG) and Invesco WilderHill Clean Energy ETF (PBW). 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.

	VIOG	PBW	Difference
Sharpe ratio: Return per unit of total volatility	1.52	3.77	-2.26
Sortino ratio: Return per unit of downside risk	2.27	3.92	-1.65
Omega ratio: Gain probability vs. loss probability	1.27	1.48	-0.21
Calmar ratio: Return relative to maximum drawdown	2.93	7.16	-4.23
Martin ratio: Return relative to average drawdown	10.01	19.88	-9.87
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

VIOG vs. PBW - Sharpe Ratio Comparison

The current VIOG Sharpe Ratio is 1.52, which is lower than the PBW Sharpe Ratio of 3.77. The chart below compares the historical Sharpe Ratios of VIOG and PBW, 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

	VIOG	PBW	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.52	3.77	-2.26
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.26	-0.24	+0.49
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.48	0.29	+0.19
Sharpe Ratio (All Time) Calculated using the full available price history	0.60	-0.03	+0.62

Drawdowns

VIOG vs. PBW - Drawdown Comparison

The maximum VIOG drawdown since its inception was -41.73%, smaller than the maximum PBW drawdown of -89.02%. Use the drawdown chart below to compare losses from any high point for VIOG and PBW.

Drawdown Indicators

	VIOG	PBW	Difference
Max Drawdown Largest peak-to-trough decline	-41.73%	-89.02%	+47.29%
Max Drawdown (1Y) Largest decline over 1 year	-9.03%	-21.24%	+12.21%
Max Drawdown (3Y) Largest decline over 3 years	-27.35%	-68.04%	+40.69%
Max Drawdown (5Y) Largest decline over 5 years	-29.15%	-84.50%	+55.35%
Max Drawdown (10Y) Largest decline over 10 years	-41.73%	-89.02%	+47.29%
Current Drawdown Current decline from peak	-1.47%	-62.54%	+61.07%
Average Drawdown Average peak-to-trough decline	-7.62%	-62.91%	+55.29%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.64%	7.64%	-5.00%

Volatility

VIOG vs. PBW - Volatility Comparison

The current volatility for Vanguard S&P Small-Cap 600 Growth ETF (VIOG) is 4.61%, while Invesco WilderHill Clean Energy ETF (PBW) has a volatility of 13.35%. This indicates that VIOG experiences smaller price fluctuations and is considered to be less risky than PBW based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VIOG	PBW	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.61%	13.35%	-8.74%
Volatility (6M) Calculated over the trailing 6-month period	12.44%	28.20%	-15.76%
Volatility (1Y) Calculated over the trailing 1-year period	17.48%	40.48%	-23.00%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.47%	42.91%	-21.44%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.84%	38.76%	-15.92%

VIOG vs. PBW - Expense Ratio Comparison

VIOG has a 0.15% expense ratio, which is lower than PBW's 0.61% expense ratio.

Dividends

VIOG vs. PBW - Dividend Comparison

VIOG's dividend yield for the trailing twelve months is around 0.84%, more than PBW's 0.60% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
PBW Invesco WilderHill Clean Energy ETF	0.60%	0.79%	2.84%	3.68%	4.21%	1.71%	0.44%	1.45%	2.04%	1.28%	2.68%	1.53%
VIOG Vanguard S&P Small-Cap 600 Growth ETF	0.84%	1.04%	1.03%	1.15%	1.17%	0.69%	0.68%	1.09%	0.76%	0.87%	0.92%	1.04%

Frequently Asked Questions

Can I hold both VIOG and PBW in my portfolio?

VIOG and PBW have a correlation of 0.61, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, VIOG or PBW?

PBW has higher volatility (13.35%) compared to VIOG (4.61%). In terms of maximum drawdown, VIOG dropped -41.73% vs PBW's -89.02%.

Which ETF is better, VIOG or PBW?

On 10-year performance, PBW leads with 11.06% vs 10.83% for VIOG. On fees, VIOG is cheaper at 0.15% per year. On volatility, VIOG has been the lower-risk option at 4.61%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, VIOG or PBW?

Over the 10-year period, PBW has performed better with a 11.06% return vs 10.83%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, VIOG or PBW?

VIOG is cheaper with a 0.15% expense ratio, compared with 0.61% for PBW.

Which ETF pays a higher dividend yield, VIOG or PBW?

VIOG has the higher dividend yield at 0.84%, compared with 0.60% for PBW.

What is the main difference between VIOG and PBW?

VIOG tracks S&P SmallCap 600 Growth Index, while PBW tracks The WilderHill Clean Energy Index (AMEX). They also come from different issuers: Vanguard and Invesco. Their fees differ too: 0.15% for VIOG and 0.61% for PBW.

Which has better risk-adjusted returns?

PBW currently has the higher Sharpe Ratio (3.77 vs 1.52), 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.