KMKAX vs. TWHIX

Last updated Aug 1, 2026

KMKAX (Kinetics Market Opportunities Fund) and TWHIX (American Century Heritage Fund) are both Mid Cap Growth Equities funds. Over the past 10 years, KMKAX returned 19.56%/yr vs 11.27%/yr for TWHIX. Their 0.61 correlation means they have sometimes moved together and sometimes differently. KMKAX charges 1.65%/yr vs 1.00%/yr for TWHIX.

Performance

KMKAX vs. TWHIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Kinetics Market Opportunities Fund (KMKAX) and American Century Heritage Fund (TWHIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, KMKAX achieves a 13.52% return, which is significantly higher than TWHIX's 3.13% return. Over the past 10 years, KMKAX has outperformed TWHIX with an annualized return of 19.56%, while TWHIX has yielded a comparatively lower 11.27% annualized return.

KMKAX

• 1D: 1.12%
• 1M: 0.06%
• 6M: 3.21%
• YTD: 13.52%
• 1Y: 7.76%
• 3Y*: 30.44%
• 5Y*: 15.01%
• 10Y*: 19.56%
• ALL TIME*: 12.01%

TWHIX

• 1D: 2.10%
• 1M: -3.99%
• 6M: 3.23%
• YTD: 3.13%
• 1Y: 0.36%
• 3Y*: 11.89%
• 5Y*: 3.31%
• 10Y*: 11.27%
• ALL TIME*: 10.98%

*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)
KMKAX Kinetics Market Opportunities Fund	$0.00	$0.00	$0.00
TWHIX American Century Heritage Fund	$0.00	$0.00	$0.00

KMKAX vs. TWHIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
KMKAX Kinetics Market Opportunities Fund	13.52%	-3.31%	83.58%	-7.57%	14.69%	27.69%	19.31%	22.42%	-10.92%	46.89%
TWHIX American Century Heritage Fund	3.13%	6.53%	24.66%	20.64%	-28.13%	11.52%	42.61%	35.50%	-5.08%	21.83%

Correlation

The correlation between KMKAX and TWHIX is 0.38, which is low. Their historical price movements had little consistent relationship.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.38
Correlation (3Y) Balances recent behavior with more history.	0.42
Correlation (5Y) Shows whether the relationship held over a longer period.	0.46
Correlation (10Y) Provides a long-term view across more market conditions.	0.45
Correlation (All Time) Calculated using the full available price history since Feb 2, 2006	0.61

Over the past year, the correlation between KMKAX and TWHIX has dropped to 0.38 - well below their long-term average of 0.61, suggesting their price drivers have been diverging.

Return for Risk

KMKAX vs. TWHIX — Risk / Return Rank

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

KMKAX

KMKAX Risk / Return Rank: 8
KMKAX Sharpe Ratio Rank: 7
KMKAX Sortino Ratio Rank: 8
KMKAX Omega Ratio Rank: 8
KMKAX Calmar Ratio Rank: 7
KMKAX Martin Ratio Rank: 7

TWHIX

TWHIX Risk / Return Rank: 4
TWHIX Sharpe Ratio Rank: 4
TWHIX Sortino Ratio Rank: 4
TWHIX Omega Ratio Rank: 4
TWHIX Calmar Ratio Rank: 4
TWHIX Martin Ratio Rank: 3

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.

KMKAX vs. TWHIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Kinetics Market Opportunities Fund (KMKAX) and American Century Heritage Fund (TWHIX). 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.

	KMKAX	TWHIX	Difference
Sharpe ratio: Return per unit of total volatility	0.19	-0.11	+0.30
Sortino ratio: Return per unit of downside risk	0.44	-0.02	+0.46
Omega ratio: Gain probability vs. loss probability	1.05	1.00	+0.06
Calmar ratio: Return relative to maximum drawdown	0.23	-0.13	+0.36
Martin ratio: Return relative to average drawdown	0.52	-0.36	+0.88

KMKAX vs. TWHIX - Sharpe Ratio Comparison

The current KMKAX Sharpe Ratio is 0.19, which is higher than the TWHIX Sharpe Ratio of -0.11. The chart below compares the historical Sharpe Ratios of KMKAX and TWHIX, 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

KMKAX vs. TWHIX - Drawdown Comparison

The maximum KMKAX drawdown since its inception was -65.57%, which is greater than TWHIX's maximum drawdown of -56.98%. Use the drawdown chart below to compare losses from any high point for KMKAX and TWHIX.

Drawdown Indicators

	KMKAX	TWHIX	Difference
Max Drawdown Largest peak-to-trough decline	-65.57%	-56.98%	-8.59%
Max Drawdown (1Y) Largest decline over 1 year	-20.20%	-15.82%	-4.38%
Max Drawdown (3Y) Largest decline over 3 years	-28.45%	-26.30%	-2.15%
Max Drawdown (5Y) Largest decline over 5 years	-31.56%	-40.34%	+8.78%
Max Drawdown (10Y) Largest decline over 10 years	-31.56%	-40.34%	+8.78%
Current Drawdown Current decline from peak	-16.97%	-5.18%	-11.79%
Average Drawdown Average peak-to-trough decline	-15.53%	-12.21%	-3.32%
Ulcer Index Depth and duration of drawdowns from previous peaks	9.11%	5.57%	+3.54%

Volatility

KMKAX vs. TWHIX - Volatility Comparison

Kinetics Market Opportunities Fund (KMKAX) has a higher volatility of 6.01% compared to American Century Heritage Fund (TWHIX) at 4.82%. This indicates that KMKAX's price experiences larger fluctuations and is considered to be riskier than TWHIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	KMKAX	TWHIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.01%	4.82%	+1.19%
Volatility (6M) Calculated over the trailing 6-month period	19.51%	14.77%	+4.74%
Volatility (1Y) Calculated over the trailing 1-year period	24.43%	18.53%	+5.90%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	26.51%	23.41%	+3.10%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	23.78%	22.85%	+0.93%

KMKAX vs. TWHIX - Expense Ratio Comparison

KMKAX has a 1.65% expense ratio, which is higher than TWHIX's 1.00% expense ratio.

Dividends

KMKAX vs. TWHIX - Dividend Comparison

KMKAX's dividend yield for the trailing twelve months is around 0.53%, less than TWHIX's 21.47% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016
KMKAX Kinetics Market Opportunities Fund	0.53%	0.61%	0.66%	0.69%	1.19%	1.29%	0.02%	0.07%	9.28%	0.51%	0.00%
TWHIX American Century Heritage Fund	21.47%	22.14%	15.58%	0.78%	0.98%	12.00%	13.72%	11.32%	25.33%	9.38%	8.71%

Frequently Asked Questions

Can I hold both KMKAX and TWHIX in my portfolio?

KMKAX and TWHIX have a correlation of 0.38, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, KMKAX or TWHIX?

KMKAX has higher volatility (6.01%) compared to TWHIX (4.82%). In terms of maximum drawdown, KMKAX dropped -65.57% vs TWHIX's -56.98%.

Which has better risk-adjusted returns?

KMKAX currently has the higher Sharpe Ratio (0.19 vs -0.11), 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.