PBW vs. VIOG

Last updated Jul 14, 2026

PBW (Invesco WilderHill Clean Energy ETF) and VIOG (Vanguard S&P Small-Cap 600 Growth ETF) are both Small Cap Growth Equities funds - PBW tracks the The WilderHill Clean Energy Index (AMEX) while VIOG tracks the S&P SmallCap 600 Growth Index. Both are passively managed. Over the past 10 years, PBW returned 7.70%/yr vs 11.03%/yr for VIOG. A 0.70 correlation means they provide meaningful diversification when combined. PBW charges 0.61%/yr vs 0.15%/yr for VIOG.

Performance

PBW vs. VIOG - Performance Comparison

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

Returns By Period

In the year-to-date period, PBW achieves a 12.09% return, which is significantly lower than VIOG's 22.77% return. Over the past 10 years, PBW has underperformed VIOG with an annualized return of 7.70%, while VIOG has yielded a comparatively higher 11.03% annualized return.

PBW

• 1D: -3.46%
• 1M: -14.83%
• 6M: -0.86%
• YTD: 12.09%
• 1Y: 55.86%
• 3Y*: -4.93%
• 5Y*: -14.27%
• 10Y*: 7.70%

VIOG

• 1D: -0.96%
• 1M: 2.31%
• 6M: 16.97%
• YTD: 22.77%
• 1Y: 28.24%
• 3Y*: 15.00%
• 5Y*: 7.23%
• 10Y*: 11.03%

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

PBW vs. VIOG - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PBW Invesco WilderHill Clean Energy ETF	12.09%	53.96%	-30.77%	-20.03%	-44.55%	-29.86%	204.82%	62.58%	-14.11%	39.92%
VIOG Vanguard S&P Small-Cap 600 Growth ETF	22.77%	5.40%	9.23%	16.92%	-21.14%	22.49%	19.68%	21.16%	-4.57%	14.70%

Correlation

The correlation between PBW and VIOG is 0.60, 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	0.60
Correlation (3Y) Calculated over the trailing 3-year period	0.68
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 9, 2010	0.70

The correlation between PBW and VIOG shifts across timeframes, from 0.60 (1 year) to 0.72 (5 years), reflecting how their relationship changes across market environments.

PBW vs. VIOG - Sectors Allocation Comparison

Sectors	PBW	VIOG
Industrials	28.0%	18.7%
Basic Materials	13.5%	3.0%
Energy	12.9%	3.8%
Consumer Cyclical	12.7%	10.7%
Technology	9.9%	21.2%
Utilities	8.4%	1.7%
Consumer Defensive	1.6%	3.4%
Financial Services	1.3%	13.4%
Communication Services	-	2.9%
Healthcare	-	14.7%
Real Estate	-	6.5%

Return for Risk

PBW vs. VIOG — Risk / Return Rank

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

PBW

PBW Risk / Return Rank: 45
PBW Sharpe Ratio Rank: 46
PBW Sortino Ratio Rank: 43
PBW Omega Ratio Rank: 41
PBW Calmar Ratio Rank: 52
PBW Martin Ratio Rank: 45

VIOG

VIOG Risk / Return Rank: 66
VIOG Sharpe Ratio Rank: 60
VIOG Sortino Ratio Rank: 65
VIOG Omega Ratio Rank: 56
VIOG Calmar Ratio Rank: 76
VIOG Martin Ratio Rank: 73

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.

PBW vs. VIOG - Risk-Adjusted Trends Comparison

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

	PBW	VIOG	Difference
Sharpe ratio: Return per unit of total volatility	1.30	1.59	-0.28
Sortino ratio: Return per unit of downside risk	1.81	2.38	-0.58
Omega ratio: Gain probability vs. loss probability	1.22	1.28	-0.06
Calmar ratio: Return relative to maximum drawdown	2.06	3.14	-1.08
Martin ratio: Return relative to average drawdown	5.82	10.77	-4.95

PBW vs. VIOG - Sharpe Ratio Comparison

The current PBW Sharpe Ratio is 1.30, which is comparable to the VIOG Sharpe Ratio of 1.59. The chart below compares the historical Sharpe Ratios of PBW and VIOG, 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

PBW vs. VIOG - Drawdown Comparison

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

Drawdown Indicators

	PBW	VIOG	Difference
Max Drawdown Largest peak-to-trough decline	-89.02%	-41.73%	-47.29%
Max Drawdown (1Y) Largest decline over 1 year	-27.22%	-9.03%	-18.19%
Max Drawdown (3Y) Largest decline over 3 years	-68.04%	-27.35%	-40.69%
Max Drawdown (5Y) Largest decline over 5 years	-84.50%	-29.15%	-55.35%
Max Drawdown (10Y) Largest decline over 10 years	-89.02%	-41.73%	-47.29%
Current Drawdown Current decline from peak	-71.75%	-3.27%	-68.48%
Average Drawdown Average peak-to-trough decline	-62.92%	-7.58%	-55.34%
Ulcer Index Depth and duration of drawdowns from previous peaks	9.62%	2.63%	+6.99%

Volatility

PBW vs. VIOG - Volatility Comparison

Invesco WilderHill Clean Energy ETF (PBW) has a higher volatility of 14.18% compared to Vanguard S&P Small-Cap 600 Growth ETF (VIOG) at 5.25%. This indicates that PBW's price experiences larger fluctuations and is considered to be riskier than VIOG based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PBW	VIOG	Difference
Volatility (1M) Calculated over the trailing 1-month period	14.18%	5.25%	+8.93%
Volatility (6M) Calculated over the trailing 6-month period	32.08%	13.06%	+19.02%
Volatility (1Y) Calculated over the trailing 1-year period	43.18%	17.92%	+25.26%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	43.54%	21.53%	+22.01%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	39.09%	22.82%	+16.27%

PBW vs. VIOG - Expense Ratio Comparison

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

Dividends

PBW vs. VIOG - Dividend Comparison

PBW's dividend yield for the trailing twelve months is around 1.39%, more than VIOG's 0.77% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
PBW Invesco WilderHill Clean Energy ETF	1.39%	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	0.77%	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 PBW and VIOG in my portfolio?

PBW and VIOG have a correlation of 0.60, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, PBW or VIOG?

PBW has higher volatility (14.18%) compared to VIOG (5.25%). In terms of maximum drawdown, PBW dropped -89.02% vs VIOG's -41.73%.

Which ETF is better, PBW or VIOG?

On 10-year performance, VIOG leads with 11.03% vs 7.70% for PBW. On fees, VIOG is cheaper at 0.15% per year. On volatility, VIOG has been the lower-risk option at 5.25%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, PBW or VIOG?

Over the 10-year period, VIOG has performed better with a 11.03% return vs 7.70%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, PBW or VIOG?

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

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

PBW has the higher dividend yield at 1.39%, compared with 0.77% for VIOG.

What is the main difference between PBW and VIOG?

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

Which has better risk-adjusted returns?

VIOG currently has the higher Sharpe Ratio (1.59 vs 1.30), 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.