PSA.TO vs. COST

Last updated Jun 14, 2026

PSA.TO (Purpose High Interest Savings Fund) is Money Market fund actively managed by Purpose Investments, while COST (Costco Wholesale Corporation) is a stock. Over the past 10 years, PSA.TO returned 2.26%/yr vs 23.32%/yr for COST. At a 0.04 correlation, their price movements are largely independent.

Performance

PSA.TO vs. COST - Performance Comparison

The chart below illustrates the hypothetical performance of a CA$10,000 investment in Purpose High Interest Savings Fund (PSA.TO) and Costco Wholesale Corporation (COST). The values are adjusted to include any dividend payments, if applicable.

Different Trading Currencies

PSA.TO is traded in CAD, while COST is traded in USD. To make them comparable, the COST values have been converted to CAD using the latest available exchange rates.

Returns By Period

In the year-to-date period, PSA.TO achieves a 0.97% return, which is significantly lower than COST's 16.55% return. Over the past 10 years, PSA.TO has underperformed COST with an annualized return of 2.26%, while COST has yielded a comparatively higher 23.32% annualized return.

PSA.TO

• 1D: 0.02%
• 1M: 0.19%
• YTD: 0.97%
• 6M: 1.10%
• 1Y: 2.34%
• 3Y*: 3.71%
• 5Y*: 3.18%
• 10Y*: 2.26%

COST

• 1D: 0.87%
• 1M: -4.65%
• YTD: 16.55%
• 6M: 12.97%
• 1Y: 2.52%
• 3Y*: 26.99%
• 5Y*: 25.70%
• 10Y*: 23.32%

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

PSA.TO vs. COST - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PSA.TO Purpose High Interest Savings Fund	0.97%	2.64%	4.55%	5.13%	2.32%	0.61%	0.93%	2.22%	1.65%	1.08%
COST Costco Wholesale Corporation	16.55%	-9.71%	51.45%	45.46%	-13.92%	51.75%	29.52%	39.70%	19.90%	14.09%

Correlation

The correlation between PSA.TO and COST is 0.11, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.11
Correlation (3Y) Calculated over the trailing 3-year period	0.11
Correlation (5Y) Calculated over the trailing 5-year period	0.06
Correlation (10Y) Calculated over the trailing 10-year period	0.03
Correlation (All Time) Calculated using the full available price history since Oct 15, 2013	0.04

Return for Risk

PSA.TO vs. COST — Risk / Return Rank

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

PSA.TO

PSA.TO Risk / Return Rank: 99
PSA.TO Sharpe Ratio Rank: 99
PSA.TO Sortino Ratio Rank: 99
PSA.TO Omega Ratio Rank: 99
PSA.TO Calmar Ratio Rank: 100
PSA.TO Martin Ratio Rank: 100

COST

COST Risk / Return Rank: 37
COST Sharpe Ratio Rank: 40
COST Sortino Ratio Rank: 32
COST Omega Ratio Rank: 32
COST Calmar Ratio Rank: 40
COST Martin Ratio Rank: 39

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.

PSA.TO vs. COST - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Purpose High Interest Savings Fund (PSA.TO) and Costco Wholesale Corporation (COST). 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.

	PSA.TO	COST	Difference
Sharpe ratio: Return per unit of total volatility	9.67	0.04	+9.63
Sortino ratio: Return per unit of downside risk	24.56	0.19	+24.36
Omega ratio: Gain probability vs. loss probability	6.11	1.02	+5.09
Calmar ratio: Return relative to maximum drawdown	119.32	0.05	+119.27
Martin ratio: Return relative to average drawdown	370.97	0.12	+370.85

PSA.TO vs. COST - Sharpe Ratio Comparison

The current PSA.TO Sharpe Ratio is 9.67, which is higher than the COST Sharpe Ratio of 0.04. The chart below compares the historical Sharpe Ratios of PSA.TO and COST, 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

PSA.TO vs. COST - Drawdown Comparison

The maximum PSA.TO drawdown since its inception was -0.04%, smaller than the maximum COST drawdown of -33.74%. Use the drawdown chart below to compare losses from any high point for PSA.TO and COST.

Drawdown Indicators

	PSA.TO	COST	Difference
Max Drawdown Largest peak-to-trough decline	-0.04%	-33.74%	+33.70%
Max Drawdown (1Y) Largest decline over 1 year	-0.02%	-14.89%	+14.87%
Max Drawdown (3Y) Largest decline over 3 years	-0.02%	-23.58%	+23.56%
Max Drawdown (5Y) Largest decline over 5 years	-0.04%	-30.01%	+29.97%
Max Drawdown (10Y) Largest decline over 10 years	-0.04%	-30.01%	+29.97%
Current Drawdown Current decline from peak	0.00%	-10.25%	+10.25%
Average Drawdown Average peak-to-trough decline	-0.00%	-7.21%	+7.21%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.01%	6.20%	-6.19%

Volatility

PSA.TO vs. COST - Volatility Comparison

The current volatility for Purpose High Interest Savings Fund (PSA.TO) is 0.06%, while Costco Wholesale Corporation (COST) has a volatility of 7.80%. This indicates that PSA.TO experiences smaller price fluctuations and is considered to be less risky than COST based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PSA.TO	COST	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.06%	7.80%	-7.74%
Volatility (6M) Calculated over the trailing 6-month period	0.17%	15.65%	-15.48%
Volatility (1Y) Calculated over the trailing 1-year period	0.25%	20.08%	-19.83%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	0.29%	23.87%	-23.58%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	0.25%	23.14%	-22.89%

Dividends

PSA.TO vs. COST - Dividend Comparison

PSA.TO's dividend yield for the trailing twelve months is around 2.33%, more than COST's 0.55% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
COST Costco Wholesale Corporation	0.55%	0.59%	0.49%	2.87%	0.76%	0.54%	3.38%	0.86%	1.08%	4.81%	1.09%	4.06%
PSA.TO Purpose High Interest Savings Fund	2.33%	2.61%	4.46%	5.05%	2.26%	0.59%	0.94%	2.18%	1.66%	1.07%	0.99%	1.07%

Frequently Asked Questions

Can I hold both PSA.TO and COST in my portfolio?

PSA.TO and COST have a correlation of 0.11, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.