PMMF vs. ATMP

Last updated Aug 4, 2026

PMMF (iShares Prime Money Market ETF) and ATMP (Barclays ETN+ Select MLP ETN) are both exchange-traded funds - PMMF is a Money Market fund actively managed by BlackRock, while ATMP is a MLPs fund tracking the CIBC Atlas Select MLP VWAP. PMMF is actively managed, while ATMP is passively managed. Over the past year, PMMF returned 3.89% vs 22.92% for ATMP. Their -0.06 correlation means they have often moved in opposite directions in the past. PMMF charges 0.20%/yr vs 0.95%/yr for ATMP.

Performance

PMMF vs. ATMP - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares Prime Money Market ETF (PMMF) and Barclays ETN+ Select MLP ETN (ATMP). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PMMF achieves a 2.14% return, which is significantly lower than ATMP's 25.27% return.

PMMF

• 1D: 0.02%
• 1M: 0.31%
• 6M: 1.81%
• YTD: 2.14%
• 1Y: 3.89%
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: 3.98%

ATMP

• 1D: -0.75%
• 1M: 4.40%
• 6M: 18.24%
• YTD: 25.27%
• 1Y: 22.92%
• 3Y*: 20.13%
• 5Y*: 18.87%
• 10Y*: 4.70%
• ALL TIME*: 2.78%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
ATMP Barclays ETN+ Select MLP ETN	$455.41K	$471.55K	$499.79K
PMMF iShares Prime Money Market ETF	$11.61M	$12.34M	$15.91M

PMMF vs. ATMP - Yearly Performance Comparison

	2026 (YTD)	2025
PMMF iShares Prime Money Market ETF	2.14%	3.75%
ATMP Barclays ETN+ Select MLP ETN	25.27%	-7.19%

Correlation

The correlation between PMMF and ATMP is -0.09, meaning there was essentially no consistent relationship between their historical price movements. Each responded to its own set of market drivers.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	-0.09
Correlation (All Time) Calculated using the full available price history since Feb 6, 2025	-0.06

Return for Risk

PMMF vs. ATMP — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

PMMF

PMMF Risk / Return Rank: 100
PMMF Sharpe Ratio Rank: 100
PMMF Sortino Ratio Rank: 100
PMMF Omega Ratio Rank: 100
PMMF Calmar Ratio Rank: 100
PMMF Martin Ratio Rank: 100

ATMP

ATMP Risk / Return Rank: 64
ATMP Sharpe Ratio Rank: 66
ATMP Sortino Ratio Rank: 66
ATMP Omega Ratio Rank: 60
ATMP Calmar Ratio Rank: 76
ATMP Martin Ratio Rank: 53

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

PMMF vs. ATMP - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares Prime Money Market ETF (PMMF) and Barclays ETN+ Select MLP ETN (ATMP). 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.

	PMMF	ATMP	Difference
Sharpe ratio: Return per unit of total volatility	21.01	1.59	+19.42
Sortino ratio: Return per unit of downside risk	107.68	2.25	+105.43
Omega ratio: Gain probability vs. loss probability	50.57	1.27	+49.29
Calmar ratio: Return relative to maximum drawdown	156.87	2.79	+154.08
Martin ratio: Return relative to average drawdown	1,677.66	6.51	+1,671.16

PMMF vs. ATMP - Sharpe Ratio Comparison

The current PMMF Sharpe Ratio is 21.01, which is higher than the ATMP Sharpe Ratio of 1.59. The chart below compares the historical Sharpe Ratios of PMMF and ATMP, 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

PMMF vs. ATMP - Drawdown Comparison

The maximum PMMF drawdown since its inception was -0.13%, smaller than the maximum ATMP drawdown of -80.86%. Use the drawdown chart below to compare losses from any high point for PMMF and ATMP.

Drawdown Indicators

	PMMF	ATMP	Difference
Max Drawdown Largest peak-to-trough decline	-0.13%	-80.86%	+80.73%
Max Drawdown (1Y) Largest decline over 1 year	-0.02%	-8.30%	+8.28%
Max Drawdown (3Y) Largest decline over 3 years	—	-16.48%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-22.98%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-75.66%	—
Current Drawdown Current decline from peak	0.00%	-2.01%	+2.01%
Average Drawdown Average peak-to-trough decline	0.00%	-30.80%	+30.80%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.00%	3.54%	-3.54%

Volatility

PMMF vs. ATMP - Volatility Comparison

The current volatility for iShares Prime Money Market ETF (PMMF) is 0.05%, while Barclays ETN+ Select MLP ETN (ATMP) has a volatility of 5.06%. This indicates that PMMF experiences smaller price fluctuations and is considered to be less risky than ATMP based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PMMF	ATMP	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.05%	5.06%	-5.01%
Volatility (6M) Calculated over the trailing 6-month period	0.13%	11.76%	-11.63%
Volatility (1Y) Calculated over the trailing 1-year period	0.19%	14.59%	-14.40%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	0.34%	21.94%	-21.60%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	0.34%	27.61%	-27.27%

PMMF vs. ATMP - Expense Ratio Comparison

PMMF has a 0.20% expense ratio, which is lower than ATMP's 0.95% expense ratio.

Dividends

PMMF vs. ATMP - Dividend Comparison

PMMF's dividend yield for the trailing twelve months is around 3.69%, while ATMP has not paid dividends to shareholders.

Position	TTM	2025
ATMP Barclays ETN+ Select MLP ETN	0.00%	0.00%
PMMF iShares Prime Money Market ETF	3.69%	3.59%

Frequently Asked Questions

Can I hold both PMMF and ATMP in my portfolio?

PMMF and ATMP have a correlation of -0.09, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, PMMF or ATMP?

ATMP has higher volatility (5.06%) compared to PMMF (0.05%). In terms of maximum drawdown, PMMF dropped -0.13% vs ATMP's -80.86%.

Which ETF is better, PMMF or ATMP?

On 1-year performance, ATMP leads with 22.92% vs 3.89% for PMMF. On fees, PMMF is cheaper at 0.20% per year. On volatility, PMMF has been the lower-risk option at 0.05%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, PMMF or ATMP?

Over the 1-year period, ATMP has performed better with a 22.92% return vs 3.89%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, PMMF or ATMP?

PMMF is cheaper with a 0.20% expense ratio, compared with 0.95% for ATMP.

Which ETF pays a higher dividend yield, PMMF or ATMP?

PMMF has the higher dividend yield at 3.69%, compared with 0.00% for ATMP.

What is the main difference between PMMF and ATMP?

PMMF is categorized as Money Market, while ATMP is MLPs. They also come from different issuers: BlackRock and Barclays Capital. Their fees differ too: 0.20% for PMMF and 0.95% for ATMP.

Which has better risk-adjusted returns?

PMMF currently has the higher Sharpe Ratio (21.01 vs 1.59), 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.