PGSIX vs. SSASX

Last updated Apr 1, 2026

Compare and contrast key facts about Putnam Mortgage Securities Fund (PGSIX) and State Street Income Fund (SSASX).

PGSIX is managed by Putnam. It was launched on Feb 8, 1984. SSASX is managed by State Street. It was launched on Jan 2, 1980.

Performance

PGSIX vs. SSASX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Putnam Mortgage Securities Fund (PGSIX) and State Street Income Fund (SSASX). The values are adjusted to include any dividend payments, if applicable.

PGSIX vs. SSASX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
PGSIX Putnam Mortgage Securities Fund	0.88%	9.36%	3.52%	3.66%	-10.79%	-4.56%
SSASX State Street Income Fund	-0.61%	7.49%	-0.95%	4.83%	-13.74%	0.59%

Returns By Period

In the year-to-date period, PGSIX achieves a 0.88% return, which is significantly higher than SSASX's -0.61% return.

PGSIX

• 1D: 0.51%
• 1M: -1.86%
• YTD: 0.88%
• 6M: 2.97%
• 1Y: 6.54%
• 3Y*: 5.81%
• 5Y*: -0.13%
• 10Y*: 1.35%

SSASX

• 1D: 0.51%
• 1M: -2.48%
• YTD: -0.61%
• 6M: 0.37%
• 1Y: 3.71%
• 3Y*: 2.41%
• 5Y*: —
• 10Y*: —

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

PGSIX vs. SSASX - Expense Ratio Comparison

PGSIX has a 0.89% expense ratio, which is higher than SSASX's 0.20% expense ratio.

PGSIX

Putnam Mortgage Securities Fund

SSASX

State Street Income Fund

Return for Risk

PGSIX vs. SSASX — Risk / Return Rank

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

PGSIX

PGSIX Risk / Return Rank: 64
PGSIX Sharpe Ratio Rank: 63
PGSIX Sortino Ratio Rank: 62
PGSIX Omega Ratio Rank: 51
PGSIX Calmar Ratio Rank: 80
PGSIX Martin Ratio Rank: 62

SSASX

SSASX Risk / Return Rank: 44
SSASX Sharpe Ratio Rank: 42
SSASX Sortino Ratio Rank: 40
SSASX Omega Ratio Rank: 30
SSASX Calmar Ratio Rank: 67
SSASX Martin Ratio Rank: 42

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.

PGSIX vs. SSASX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Putnam Mortgage Securities Fund (PGSIX) and State Street Income Fund (SSASX). 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.

	PGSIX	SSASX	Difference
Sharpe ratio Return per unit of total volatility	1.13	0.90	+0.23
Sortino ratio Return per unit of downside risk	1.58	1.28	+0.30
Omega ratio Gain probability vs. loss probability	1.21	1.16	+0.05
Calmar ratio Return relative to maximum drawdown	1.91	1.58	+0.33
Martin ratio Return relative to average drawdown	5.87	4.37	+1.50
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

PGSIX vs. SSASX - Sharpe Ratio Comparison

The current PGSIX Sharpe Ratio is 1.13, which is comparable to the SSASX Sharpe Ratio of 0.90. The chart below compares the historical Sharpe Ratios of PGSIX and SSASX, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	PGSIX	SSASX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.13	0.90	+0.23
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.02	—	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.23	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.83	-0.12	+0.96

Correlation

The correlation between PGSIX and SSASX is 0.79, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.

Dividends

PGSIX vs. SSASX - Dividend Comparison

PGSIX's dividend yield for the trailing twelve months is around 5.16%, more than SSASX's 3.66% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
PGSIX Putnam Mortgage Securities Fund	5.16%	5.67%	16.88%	8.38%	12.83%	4.30%	4.21%	4.50%	3.94%	3.10%	2.92%	2.51%
SSASX State Street Income Fund	3.66%	4.01%	2.76%	2.86%	2.48%	3.77%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Drawdowns

PGSIX vs. SSASX - Drawdown Comparison

The maximum PGSIX drawdown since its inception was -22.28%, which is greater than SSASX's maximum drawdown of -19.65%. Use the drawdown chart below to compare losses from any high point for PGSIX and SSASX.

Drawdown Indicators

	PGSIX	SSASX	Difference
Max Drawdown Largest peak-to-trough decline	-22.28%	-19.65%	-2.63%
Max Drawdown (1Y) Largest decline over 1 year	-3.85%	-3.12%	-0.73%
Max Drawdown (5Y) Largest decline over 5 years	-21.57%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-22.28%	—	—
Current Drawdown Current decline from peak	-1.86%	-5.84%	+3.98%
Average Drawdown Average peak-to-trough decline	-2.62%	-9.83%	+7.21%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.25%	1.13%	+0.12%

Volatility

PGSIX vs. SSASX - Volatility Comparison

Putnam Mortgage Securities Fund (PGSIX) has a higher volatility of 1.91% compared to State Street Income Fund (SSASX) at 1.60%. This indicates that PGSIX's price experiences larger fluctuations and is considered to be riskier than SSASX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PGSIX	SSASX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.91%	1.60%	+0.31%
Volatility (6M) Calculated over the trailing 6-month period	3.44%	2.76%	+0.68%
Volatility (1Y) Calculated over the trailing 1-year period	5.95%	4.82%	+1.13%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.96%	6.56%	+0.40%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	5.91%	6.56%	-0.65%