VBISX vs. RSDIX

Last updated Aug 5, 2026

VBISX (Vanguard Short-Term Bond Index Fund) and RSDIX (RBC Short Duration Fixed Income Fund) are both Short-Term Bond funds. Their 0.71 correlation means they have sometimes moved together and sometimes differently. VBISX charges 0.15%/yr vs 0.78%/yr for RSDIX.

Performance

VBISX vs. RSDIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Short-Term Bond Index Fund (VBISX) and RBC Short Duration Fixed Income Fund (RSDIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

VBISX

• 1D: 0.10%
• 1M: -0.29%
• 6M: 0.06%
• YTD: 0.10%
• 1Y: 2.02%
• 3Y*: 4.06%
• 5Y*: 1.35%
• 10Y*: 1.73%
• ALL TIME*: 3.36%

RSDIX

• 1D: —
• 1M: —
• 6M: —
• YTD: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: —

*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)
VBISX Vanguard Short-Term Bond Index Fund	$0.00	$0.00	$0.00

VBISX vs. RSDIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VBISX Vanguard Short-Term Bond Index Fund	0.10%	5.67%	3.66%	4.54%	-5.61%	-1.35%	4.63%	4.78%	1.27%	1.10%
RSDIX RBC Short Duration Fixed Income Fund	-2.16%	4.86%	5.13%	5.52%	-4.00%	-0.06%	3.58%	5.47%	1.02%	2.13%

Correlation

The correlation between VBISX and RSDIX is 0.53, which is moderate. They have sometimes moved together and sometimes differently, sharing some price drivers without tracking each other closely.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.53
Correlation (3Y) Balances recent behavior with more history.	0.73
Correlation (5Y) Shows whether the relationship held over a longer period.	0.80
Correlation (10Y) Provides a long-term view across more market conditions.	0.74
Correlation (All Time) Calculated using the full available price history since Jan 2, 2014	0.71

The correlation between VBISX and RSDIX shifts across timeframes, from 0.53 (1 year) to 0.80 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

VBISX vs. RSDIX — Risk / Return Rank

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

VBISX

VBISX Risk / Return Rank: 25
VBISX Sharpe Ratio Rank: 25
VBISX Sortino Ratio Rank: 27
VBISX Omega Ratio Rank: 25
VBISX Calmar Ratio Rank: 27
VBISX Martin Ratio Rank: 23

RSDIX

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

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.

VBISX vs. RSDIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Short-Term Bond Index Fund (VBISX) and RBC Short Duration Fixed Income Fund (RSDIX). 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.

	VBISX	RSDIX	Difference
Sharpe ratio: Return per unit of total volatility	0.95	—	—
Sortino ratio: Return per unit of downside risk	1.49	—	—
Omega ratio: Gain probability vs. loss probability	1.18	—	—
Calmar ratio: Return relative to maximum drawdown	1.31	—	—
Martin ratio: Return relative to average drawdown	3.58	—	—

Drawdowns

Drawdown Indicators

	VBISX	RSDIX	Difference
Max Drawdown Largest peak-to-trough decline	-8.79%	—	—
Max Drawdown (1Y) Largest decline over 1 year	-1.54%	—	—
Max Drawdown (3Y) Largest decline over 3 years	-1.55%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-8.54%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-8.79%	—	—
Current Drawdown Current decline from peak	-0.82%	—	—
Average Drawdown Average peak-to-trough decline	-0.87%	—	—
Ulcer Index Depth and duration of drawdowns from previous peaks	0.56%	—	—

Volatility

Volatility by Period

	VBISX	RSDIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.48%	—	—
Volatility (6M) Calculated over the trailing 6-month period	1.66%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	2.14%	—	—
Volatility (5Y) Calculated over the trailing 5-year period, annualized	2.96%	—	—
Volatility (10Y) Calculated over the trailing 10-year period, annualized	2.39%	—	—

VBISX vs. RSDIX - Expense Ratio Comparison

VBISX has a 0.15% expense ratio, which is lower than RSDIX's 0.78% expense ratio.

Dividends

VBISX vs. RSDIX - Dividend Comparison

VBISX's dividend yield for the trailing twelve months is around 3.60%, less than RSDIX's 3.65% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
RSDIX RBC Short Duration Fixed Income Fund	3.65%	4.75%	4.16%	2.71%	1.92%	2.24%	2.01%	2.68%	2.44%	2.01%	1.80%	1.77%
VBISX Vanguard Short-Term Bond Index Fund	3.60%	3.44%	3.29%	2.10%	1.38%	1.16%	1.72%	2.16%	1.92%	1.58%	1.42%	1.34%

Frequently Asked Questions

Can I hold both VBISX and RSDIX in my portfolio?

VBISX and RSDIX have a correlation of 0.53, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.