PTRIX vs. LMSMX

Last updated Jun 3, 2026

PTRIX (PIMCO Mortgage-Backed Securities Fund) and LMSMX (Western Asset SMASh Series M Fund) are both Intermediate Core-Plus Bond funds. A 0.71 correlation means they provide meaningful diversification when combined. PTRIX charges 0.50%/yr vs 0.00%/yr for LMSMX.

Performance

PTRIX vs. LMSMX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in PIMCO Mortgage-Backed Securities Fund (PTRIX) and Western Asset SMASh Series M Fund (LMSMX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

PTRIX

• 1D: —
• 1M: —
• YTD: —
• 6M: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

LMSMX

• 1D: -0.13%
• 1M: -0.14%
• YTD: 1.11%
• 6M: 1.46%
• 1Y: 8.61%
• 3Y*: 4.81%
• 5Y*: -1.94%
• 10Y*: —

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

PTRIX vs. LMSMX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PTRIX PIMCO Mortgage-Backed Securities Fund	0.00%	0.00%	5.87%	5.25%	-14.13%	1.04%	5.30%	6.44%	1.35%	4.17%
LMSMX Western Asset SMASh Series M Fund	1.11%	12.15%	-1.72%	5.13%	-23.44%	-2.32%	12.86%	7.71%	1.46%	5.52%

Correlation

The correlation between PTRIX and LMSMX is 0.71, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (3Y) Calculated over the trailing 3-year period	0.67
Correlation (5Y) Calculated over the trailing 5-year period	0.77
Correlation (All Time) Calculated using the full available price history since Feb 2, 2017	0.71

The correlation between PTRIX and LMSMX shifts across timeframes, from 0.67 (3 years) to 0.77 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

PTRIX vs. LMSMX — Risk / Return Rank

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

LMSMX

LMSMX Risk / Return Rank: 40
LMSMX Sharpe Ratio Rank: 27
LMSMX Sortino Ratio Rank: 32
LMSMX Omega Ratio Rank: 32
LMSMX Calmar Ratio Rank: 71
LMSMX Martin Ratio Rank: 41

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.

PTRIX vs. LMSMX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for PIMCO Mortgage-Backed Securities Fund (PTRIX) and Western Asset SMASh Series M Fund (LMSMX). 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.

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

Sharpe Ratios by Period

	PTRIX	LMSMX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	—	1.52	—
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	-0.19	—
Sharpe Ratio (All Time) Calculated using the full available price history	—	0.17	—

Drawdowns

Drawdown Indicators

	PTRIX	LMSMX	Difference
Max Drawdown Largest peak-to-trough decline	—	-30.76%	—
Max Drawdown (1Y) Largest decline over 1 year	—	-2.64%	—
Max Drawdown (3Y) Largest decline over 3 years	—	-10.50%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-30.18%	—
Current Drawdown Current decline from peak	—	-12.55%	—
Average Drawdown Average peak-to-trough decline	—	-10.12%	—
Ulcer Index Depth and duration of drawdowns from previous peaks	—	0.98%	—

Volatility

Volatility by Period

	PTRIX	LMSMX	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	1.32%	—
Volatility (6M) Calculated over the trailing 6-month period	—	2.68%	—
Volatility (1Y) Calculated over the trailing 1-year period	—	5.42%	—
Volatility (5Y) Calculated over the trailing 5-year period, annualized	—	10.38%	—
Volatility (10Y) Calculated over the trailing 10-year period, annualized	—	8.16%	—

PTRIX vs. LMSMX - Expense Ratio Comparison

PTRIX has a 0.50% expense ratio, which is higher than LMSMX's 0.00% expense ratio.

Dividends

PTRIX vs. LMSMX - Dividend Comparison

PTRIX has not paid dividends to shareholders, while LMSMX's dividend yield for the trailing twelve months is around 4.40%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
LMSMX Western Asset SMASh Series M Fund	4.40%	4.20%	5.24%	4.68%	3.40%	3.78%	6.84%	7.19%	3.18%	3.24%	0.00%	0.00%
PTRIX PIMCO Mortgage-Backed Securities Fund	0.00%	0.00%	4.07%	5.32%	3.82%	3.02%	2.89%	3.73%	3.54%	3.04%	3.18%	2.43%

Frequently Asked Questions

Can I hold both PTRIX and LMSMX in my portfolio?

PTRIX and LMSMX have a correlation of 0.71, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.