BDSKX vs. RIVSX

Last updated Apr 1, 2026

Compare and contrast key facts about BlackRock Advantage Small Cap Core Fund Class K (BDSKX) and River Oak Discovery Fund (RIVSX).

BDSKX is a passively managed fund by BlackRock that tracks the performance of the Russell 2000 Index. It was launched on Mar 14, 2013. RIVSX is managed by Oak Associates. It was launched on Jun 30, 2005.

Performance

BDSKX vs. RIVSX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in BlackRock Advantage Small Cap Core Fund Class K (BDSKX) and River Oak Discovery Fund (RIVSX). The values are adjusted to include any dividend payments, if applicable.

BDSKX vs. RIVSX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BDSKX BlackRock Advantage Small Cap Core Fund Class K	-1.90%	13.76%	11.96%	16.49%	-19.20%	14.87%	19.60%	33.45%	-8.80%	9.97%
RIVSX River Oak Discovery Fund	4.25%	9.11%	4.42%	8.18%	-14.53%	24.78%	29.00%	30.36%	-13.72%	10.36%

Returns By Period

In the year-to-date period, BDSKX achieves a -1.90% return, which is significantly lower than RIVSX's 4.25% return.

BDSKX

• 1D: -1.60%
• 1M: -7.71%
• YTD: -1.90%
• 6M: 1.03%
• 1Y: 22.37%
• 3Y*: 12.30%
• 5Y*: 3.87%
• 10Y*: —

RIVSX

• 1D: -0.97%
• 1M: -7.33%
• YTD: 4.25%
• 6M: 8.20%
• 1Y: 24.27%
• 3Y*: 7.47%
• 5Y*: 4.09%
• 10Y*: 9.61%

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

BDSKX vs. RIVSX - Expense Ratio Comparison

BDSKX has a 0.45% expense ratio, which is lower than RIVSX's 1.18% expense ratio.

RIVSX

River Oak Discovery Fund

BDSKX

BlackRock Advantage Small Cap Core Fund Class K

Return for Risk

BDSKX vs. RIVSX — Risk / Return Rank

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

BDSKX

BDSKX Risk / Return Rank: 53
BDSKX Sharpe Ratio Rank: 49
BDSKX Sortino Ratio Rank: 53
BDSKX Omega Ratio Rank: 43
BDSKX Calmar Ratio Rank: 60
BDSKX Martin Ratio Rank: 59

RIVSX

RIVSX Risk / Return Rank: 65
RIVSX Sharpe Ratio Rank: 60
RIVSX Sortino Ratio Rank: 66
RIVSX Omega Ratio Rank: 54
RIVSX Calmar Ratio Rank: 74
RIVSX Martin Ratio Rank: 70

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.

BDSKX vs. RIVSX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for BlackRock Advantage Small Cap Core Fund Class K (BDSKX) and River Oak Discovery Fund (RIVSX). 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.

	BDSKX	RIVSX	Difference
Sharpe ratio Return per unit of total volatility	0.96	1.09	-0.13
Sortino ratio Return per unit of downside risk	1.45	1.67	-0.22
Omega ratio Gain probability vs. loss probability	1.19	1.22	-0.03
Calmar ratio Return relative to maximum drawdown	1.41	1.73	-0.32
Martin ratio Return relative to average drawdown	5.64	6.62	-0.98
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

BDSKX vs. RIVSX - Sharpe Ratio Comparison

The current BDSKX Sharpe Ratio is 0.96, which is comparable to the RIVSX Sharpe Ratio of 1.09. The chart below compares the historical Sharpe Ratios of BDSKX and RIVSX, 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

	BDSKX	RIVSX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.96	1.09	-0.13
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.17	0.20	-0.03
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.44	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.37	0.33	+0.04

Correlation

The correlation between BDSKX and RIVSX is 0.90, 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

BDSKX vs. RIVSX - Dividend Comparison

BDSKX's dividend yield for the trailing twelve months is around 4.89%, more than RIVSX's 0.28% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BDSKX BlackRock Advantage Small Cap Core Fund Class K	4.89%	4.80%	0.81%	1.01%	3.59%	12.08%	2.59%	1.72%	5.70%	2.33%	0.00%	0.00%
RIVSX River Oak Discovery Fund	0.28%	0.29%	0.00%	0.00%	0.15%	16.84%	14.54%	3.81%	17.54%	5.48%	0.00%	0.11%

Drawdowns

BDSKX vs. RIVSX - Drawdown Comparison

The maximum BDSKX drawdown since its inception was -43.30%, smaller than the maximum RIVSX drawdown of -60.61%. Use the drawdown chart below to compare losses from any high point for BDSKX and RIVSX.

Drawdown Indicators

	BDSKX	RIVSX	Difference
Max Drawdown Largest peak-to-trough decline	-43.30%	-60.61%	+17.31%
Max Drawdown (1Y) Largest decline over 1 year	-13.88%	-12.41%	-1.47%
Max Drawdown (5Y) Largest decline over 5 years	-31.65%	-25.75%	-5.90%
Max Drawdown (10Y) Largest decline over 10 years	—	-41.45%	—
Current Drawdown Current decline from peak	-9.88%	-9.11%	-0.77%
Average Drawdown Average peak-to-trough decline	-9.66%	-10.57%	+0.91%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.47%	3.24%	+0.23%

Volatility

BDSKX vs. RIVSX - Volatility Comparison

BlackRock Advantage Small Cap Core Fund Class K (BDSKX) has a higher volatility of 6.85% compared to River Oak Discovery Fund (RIVSX) at 5.47%. This indicates that BDSKX's price experiences larger fluctuations and is considered to be riskier than RIVSX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BDSKX	RIVSX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.85%	5.47%	+1.38%
Volatility (6M) Calculated over the trailing 6-month period	14.38%	13.56%	+0.82%
Volatility (1Y) Calculated over the trailing 1-year period	23.16%	22.40%	+0.76%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.53%	20.34%	+2.19%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	23.87%	21.87%	+2.00%