THPGX vs. RIDAX

Last updated Jun 4, 2026

THPGX (Thompson LargeCap Fund) and RIDAX (The Income Fund of America Class R-1) are both Large Cap Value Equities funds. Over the past 10 years, THPGX returned 14.89%/yr vs 7.65%/yr for RIDAX. Their correlation of 0.87 suggests significant overlap in exposure. THPGX charges 0.99%/yr vs 1.36%/yr for RIDAX.

Performance

THPGX vs. RIDAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Thompson LargeCap Fund (THPGX) and The Income Fund of America Class R-1 (RIDAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, THPGX achieves a 12.02% return, which is significantly higher than RIDAX's 5.99% return. Over the past 10 years, THPGX has outperformed RIDAX with an annualized return of 14.89%, while RIDAX has yielded a comparatively lower 7.65% annualized return.

THPGX

• 1D: 0.31%
• 1M: 4.18%
• YTD: 12.02%
• 6M: 14.47%
• 1Y: 40.27%
• 3Y*: 22.75%
• 5Y*: 12.38%
• 10Y*: 14.89%

RIDAX

• 1D: 0.33%
• 1M: 0.89%
• YTD: 5.99%
• 6M: 6.96%
• 1Y: 14.85%
• 3Y*: 12.77%
• 5Y*: 6.87%
• 10Y*: 7.65%

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

THPGX vs. RIDAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
THPGX Thompson LargeCap Fund	12.02%	27.10%	17.14%	22.06%	-15.78%	28.09%	15.49%	33.59%	-12.31%	18.24%
RIDAX The Income Fund of America Class R-1	5.99%	16.83%	9.49%	6.16%	-7.14%	16.47%	3.68%	17.57%	-6.06%	11.86%

Correlation

The correlation between THPGX and RIDAX is 0.74, 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	0.74
Correlation (3Y) Calculated over the trailing 3-year period	0.81
Correlation (5Y) Calculated over the trailing 5-year period	0.85
Correlation (10Y) Calculated over the trailing 10-year period	0.85
Correlation (All Time) Calculated using the full available price history since Jan 3, 2003	0.87

The correlation between THPGX and RIDAX shifts across timeframes, from 0.74 (1 year) to 0.87 (all time), reflecting how their relationship changes across market environments.

Return for Risk

THPGX vs. RIDAX — Risk / Return Rank

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

THPGX

THPGX Risk / Return Rank: 92
THPGX Sharpe Ratio Rank: 94
THPGX Sortino Ratio Rank: 92
THPGX Omega Ratio Rank: 86
THPGX Calmar Ratio Rank: 92
THPGX Martin Ratio Rank: 93

RIDAX

RIDAX Risk / Return Rank: 48
RIDAX Sharpe Ratio Rank: 52
RIDAX Sortino Ratio Rank: 51
RIDAX Omega Ratio Rank: 50
RIDAX Calmar Ratio Rank: 43
RIDAX Martin Ratio Rank: 43

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.

THPGX vs. RIDAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Thompson LargeCap Fund (THPGX) and The Income Fund of America Class R-1 (RIDAX). 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.

	THPGX	RIDAX	Difference
Sharpe ratio: Return per unit of total volatility	3.31	2.12	+1.19
Sortino ratio: Return per unit of downside risk	4.60	3.00	+1.60
Omega ratio: Gain probability vs. loss probability	1.60	1.39	+0.21
Calmar ratio: Return relative to maximum drawdown	5.04	2.47	+2.57
Martin ratio: Return relative to average drawdown	20.55	9.14	+11.41
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

THPGX vs. RIDAX - Sharpe Ratio Comparison

The current THPGX Sharpe Ratio is 3.31, which is higher than the RIDAX Sharpe Ratio of 2.12. The chart below compares the historical Sharpe Ratios of THPGX and RIDAX, 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

	THPGX	RIDAX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	3.31	2.12	+1.19
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.70	0.73	-0.03
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.75	0.72	+0.03
Sharpe Ratio (All Time) Calculated using the full available price history	0.50	0.68	-0.18

Drawdowns

THPGX vs. RIDAX - Drawdown Comparison

The maximum THPGX drawdown since its inception was -65.52%, which is greater than RIDAX's maximum drawdown of -42.37%. Use the drawdown chart below to compare losses from any high point for THPGX and RIDAX.

Drawdown Indicators

	THPGX	RIDAX	Difference
Max Drawdown Largest peak-to-trough decline	-65.52%	-42.37%	-23.15%
Max Drawdown (1Y) Largest decline over 1 year	-8.16%	-6.13%	-2.03%
Max Drawdown (3Y) Largest decline over 3 years	-18.75%	-8.71%	-10.04%
Max Drawdown (5Y) Largest decline over 5 years	-26.49%	-16.28%	-10.21%
Max Drawdown (10Y) Largest decline over 10 years	-40.68%	-26.22%	-14.46%
Current Drawdown Current decline from peak	0.00%	-1.40%	+1.40%
Average Drawdown Average peak-to-trough decline	-9.58%	-4.40%	-5.18%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.00%	1.65%	+0.35%

Volatility

THPGX vs. RIDAX - Volatility Comparison

Thompson LargeCap Fund (THPGX) has a higher volatility of 2.63% compared to The Income Fund of America Class R-1 (RIDAX) at 2.03%. This indicates that THPGX's price experiences larger fluctuations and is considered to be riskier than RIDAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	THPGX	RIDAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.63%	2.03%	+0.60%
Volatility (6M) Calculated over the trailing 6-month period	8.86%	5.61%	+3.25%
Volatility (1Y) Calculated over the trailing 1-year period	12.41%	7.13%	+5.28%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.75%	9.48%	+8.27%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.94%	10.69%	+9.25%

THPGX vs. RIDAX - Expense Ratio Comparison

THPGX has a 0.99% expense ratio, which is lower than RIDAX's 1.36% expense ratio.

Dividends

THPGX vs. RIDAX - Dividend Comparison

THPGX's dividend yield for the trailing twelve months is around 5.00%, less than RIDAX's 8.74% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
RIDAX The Income Fund of America Class R-1	8.74%	9.24%	5.14%	2.38%	6.20%	5.92%	2.09%	4.25%	6.58%	3.68%	2.32%	4.26%
THPGX Thompson LargeCap Fund	5.00%	5.60%	11.97%	8.38%	5.06%	4.95%	0.90%	2.73%	0.89%	0.82%	0.80%	0.72%

Frequently Asked Questions

Can I hold both THPGX and RIDAX in my portfolio?

THPGX and RIDAX have a correlation of 0.74, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, THPGX or RIDAX?

THPGX has higher volatility (2.63%) compared to RIDAX (2.03%). In terms of maximum drawdown, THPGX dropped -65.52% vs RIDAX's -42.37%.

Which has better risk-adjusted returns?

THPGX currently has the higher Sharpe Ratio (3.31 vs 2.12), 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.