ROM vs. KORU

Last updated Jun 4, 2026

ROM (ProShares Ultra Technology) and KORU (Direxion Daily South Korea Bull 3X Shares) are both Leveraged Equities funds - ROM tracks the Dow Jones U.S. Technology Index (200%) while KORU tracks the MSCI Korea 25-50 Index. Both are passively managed. Over the past 10 years, ROM returned 42.70%/yr vs 19.62%/yr for KORU. A 0.55 correlation means they provide meaningful diversification when combined. ROM charges 0.95%/yr vs 1.29%/yr for KORU.

Performance

ROM vs. KORU - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in ProShares Ultra Technology (ROM) and Direxion Daily South Korea Bull 3X Shares (KORU). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, ROM achieves a 77.72% return, which is significantly lower than KORU's 559.14% return. Over the past 10 years, ROM has outperformed KORU with an annualized return of 42.70%, while KORU has yielded a comparatively lower 19.62% annualized return.

ROM

• 1D: -2.01%
• 1M: 45.36%
• YTD: 77.72%
• 6M: 74.45%
• 1Y: 152.07%
• 3Y*: 59.24%
• 5Y*: 31.70%
• 10Y*: 42.70%

KORU

• 1D: -2.29%
• 1M: 92.47%
• YTD: 559.14%
• 6M: 689.29%
• 1Y: 2,160.10%
• 3Y*: 132.56%
• 5Y*: 23.42%
• 10Y*: 19.62%

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

ROM vs. KORU - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
ROM ProShares Ultra Technology	77.72%	35.63%	31.65%	130.70%	-63.86%	77.75%	80.42%	102.10%	-9.89%	81.11%
KORU Direxion Daily South Korea Bull 3X Shares	559.14%	432.73%	-62.18%	28.61%	-70.16%	-33.86%	48.78%	5.47%	-59.89%	167.08%

Correlation

The correlation between ROM and KORU is 0.65, 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	0.65
Correlation (3Y) Calculated over the trailing 3-year period	0.59
Correlation (5Y) Calculated over the trailing 5-year period	0.59
Correlation (10Y) Calculated over the trailing 10-year period	0.58
Correlation (All Time) Calculated using the full available price history since Apr 11, 2013	0.55

The correlation between ROM and KORU has been stable across timeframes, ranging from 0.55 to 0.65 - a consistent structural relationship.

ROM vs. KORU - Sectors Allocation Comparison

Sectors	ROM	KORU
Technology	55.2%	52.3%
Financial Services	3.0%	16.7%
Energy	0.1%	1.4%
Industrials	0.0%	20.4%
Basic Materials	-	2.0%
Communication Services	-	2.9%
Consumer Cyclical	-	5.8%
Consumer Defensive	-	1.8%
Healthcare	-	3.5%
Real Estate	-	-
Utilities	-	0.4%

Return for Risk

ROM vs. KORU — Risk / Return Rank

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

ROM

ROM Risk / Return Rank: 83
ROM Sharpe Ratio Rank: 94
ROM Sortino Ratio Rank: 81
ROM Omega Ratio Rank: 80
ROM Calmar Ratio Rank: 85
ROM Martin Ratio Rank: 75

KORU

KORU Risk / Return Rank: 97
KORU Sharpe Ratio Rank: 100
KORU Sortino Ratio Rank: 95
KORU Omega Ratio Rank: 95
KORU Calmar Ratio Rank: 99
KORU Martin Ratio Rank: 99

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.

ROM vs. KORU - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for ProShares Ultra Technology (ROM) and Direxion Daily South Korea Bull 3X Shares (KORU). 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.

	ROM	KORU	Difference
Sharpe ratio: Return per unit of total volatility	3.66	17.63	-13.96
Sortino ratio: Return per unit of downside risk	3.69	5.20	-1.52
Omega ratio: Gain probability vs. loss probability	1.48	1.72	-0.24
Calmar ratio: Return relative to maximum drawdown	4.73	35.65	-30.91
Martin ratio: Return relative to average drawdown	14.47	112.99	-98.52
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

ROM vs. KORU - Sharpe Ratio Comparison

The current ROM Sharpe Ratio is 3.66, which is lower than the KORU Sharpe Ratio of 17.63. The chart below compares the historical Sharpe Ratios of ROM and KORU, 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

	ROM	KORU	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	3.66	17.63	-13.96
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.62	0.28	+0.34
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.86	0.25	+0.61
Sharpe Ratio (All Time) Calculated using the full available price history	0.54	0.13	+0.41

Drawdowns

ROM vs. KORU - Drawdown Comparison

The maximum ROM drawdown since its inception was -83.36%, smaller than the maximum KORU drawdown of -95.79%. Use the drawdown chart below to compare losses from any high point for ROM and KORU.

Drawdown Indicators

	ROM	KORU	Difference
Max Drawdown Largest peak-to-trough decline	-83.36%	-95.79%	+12.43%
Max Drawdown (1Y) Largest decline over 1 year	-32.33%	-61.39%	+29.06%
Max Drawdown (3Y) Largest decline over 3 years	-48.10%	-73.71%	+25.61%
Max Drawdown (5Y) Largest decline over 5 years	-67.55%	-93.35%	+25.80%
Max Drawdown (10Y) Largest decline over 10 years	-67.55%	-95.79%	+28.24%
Current Drawdown Current decline from peak	-2.01%	-5.39%	+3.38%
Average Drawdown Average peak-to-trough decline	-20.88%	-57.53%	+36.65%
Ulcer Index Depth and duration of drawdowns from previous peaks	10.55%	19.33%	-8.78%

Volatility

ROM vs. KORU - Volatility Comparison

The current volatility for ProShares Ultra Technology (ROM) is 14.00%, while Direxion Daily South Korea Bull 3X Shares (KORU) has a volatility of 60.18%. This indicates that ROM experiences smaller price fluctuations and is considered to be less risky than KORU based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ROM	KORU	Difference
Volatility (1M) Calculated over the trailing 1-month period	14.00%	60.18%	-46.18%
Volatility (6M) Calculated over the trailing 6-month period	33.37%	110.71%	-77.34%
Volatility (1Y) Calculated over the trailing 1-year period	41.83%	124.15%	-82.32%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	51.63%	85.11%	-33.48%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	49.82%	79.91%	-30.09%

ROM vs. KORU - Expense Ratio Comparison

ROM has a 0.95% expense ratio, which is lower than KORU's 1.29% expense ratio.

Dividends

ROM vs. KORU - Dividend Comparison

ROM's dividend yield for the trailing twelve months is around 0.14%, which matches KORU's 0.14% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
KORU Direxion Daily South Korea Bull 3X Shares	0.14%	0.89%	4.10%	2.55%	0.48%	0.76%	0.01%	0.93%	1.40%	3.59%	0.00%	0.00%
ROM ProShares Ultra Technology	0.14%	0.24%	0.21%	0.01%	0.00%	0.00%	0.05%	0.16%	0.30%	0.08%	0.20%	0.12%

Frequently Asked Questions

Can I hold both ROM and KORU in my portfolio?

ROM and KORU have a correlation of 0.65, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, ROM or KORU?

KORU has higher volatility (60.18%) compared to ROM (14.00%). In terms of maximum drawdown, ROM dropped -83.36% vs KORU's -95.79%.

Which ETF is better, ROM or KORU?

On 10-year performance, ROM leads with 42.70% vs 19.62% for KORU. On fees, ROM is cheaper at 0.95% per year. On volatility, ROM has been the lower-risk option at 14.00%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, ROM or KORU?

Over the 10-year period, ROM has performed better with a 42.70% return vs 19.62%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, ROM or KORU?

ROM is cheaper with a 0.95% expense ratio, compared with 1.29% for KORU.

Which ETF pays a higher dividend yield, ROM or KORU?

ROM and KORU have nearly identical dividend yields, around 0.14%.

What is the main difference between ROM and KORU?

ROM tracks Dow Jones U.S. Technology Index (200%), while KORU tracks MSCI Korea 25-50 Index. They also come from different issuers: ProShares and Direxion. Their fees differ too: 0.95% for ROM and 1.29% for KORU.

Which has better risk-adjusted returns?

KORU currently has the higher Sharpe Ratio (17.63 vs 3.66), 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.