VBITX vs. FYBTX

Last updated Jul 17, 2026

VBITX (Vanguard Short-Term Bond Index Fund Institutional Shares) and FYBTX (Fidelity Series Short-Term Credit Fund) are both Total Bond Market funds. Over the past 10 years, VBITX returned 1.88%/yr vs 2.57%/yr for FYBTX. A 0.80 correlation means they provide meaningful diversification when combined. VBITX charges 0.05%/yr vs 0.00%/yr for FYBTX.

Performance

VBITX vs. FYBTX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Short-Term Bond Index Fund Institutional Shares (VBITX) and Fidelity Series Short-Term Credit Fund (FYBTX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, VBITX achieves a 0.45% return, which is significantly lower than FYBTX's 1.18% return. Over the past 10 years, VBITX has underperformed FYBTX with an annualized return of 1.88%, while FYBTX has yielded a comparatively higher 2.57% annualized return.

VBITX

• 1D: 0.20%
• 1M: 0.14%
• 6M: 0.65%
• YTD: 0.45%
• 1Y: 3.37%
• 3Y*: 4.44%
• 5Y*: 1.59%
• 10Y*: 1.88%

FYBTX

• 1D: 0.10%
• 1M: 0.26%
• 6M: 1.28%
• YTD: 1.18%
• 1Y: 4.09%
• 3Y*: 5.24%
• 5Y*: 2.78%
• 10Y*: 2.57%

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

VBITX vs. FYBTX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VBITX Vanguard Short-Term Bond Index Fund Institutional Shares	0.45%	6.11%	3.77%	4.43%	-5.61%	-1.18%	4.72%	4.89%	1.38%	1.20%
FYBTX Fidelity Series Short-Term Credit Fund	1.18%	5.72%	5.13%	6.08%	-3.50%	-0.54%	3.99%	5.07%	1.66%	1.50%

Correlation

The correlation between VBITX and FYBTX is 0.82, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.82
Correlation (3Y) Calculated over the trailing 3-year period	0.86
Correlation (5Y) Calculated over the trailing 5-year period	0.87
Correlation (10Y) Calculated over the trailing 10-year period	0.80
Correlation (All Time) Calculated using the full available price history since Jan 4, 2016	0.80

The correlation between VBITX and FYBTX has been stable across timeframes, ranging from 0.80 to 0.87 - a consistent structural relationship.

Return for Risk

VBITX vs. FYBTX — Risk / Return Rank

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

VBITX

VBITX Risk / Return Rank: 54
VBITX Sharpe Ratio Rank: 49
VBITX Sortino Ratio Rank: 69
VBITX Omega Ratio Rank: 56
VBITX Calmar Ratio Rank: 56
VBITX Martin Ratio Rank: 40

FYBTX

FYBTX Risk / Return Rank: 90
FYBTX Sharpe Ratio Rank: 84
FYBTX Sortino Ratio Rank: 94
FYBTX Omega Ratio Rank: 91
FYBTX Calmar Ratio Rank: 88
FYBTX Martin Ratio Rank: 91

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.

VBITX vs. FYBTX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Short-Term Bond Index Fund Institutional Shares (VBITX) and Fidelity Series Short-Term Credit Fund (FYBTX). 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.

	VBITX	FYBTX	Difference
Sharpe ratio: Return per unit of total volatility	1.58	2.25	-0.68
Sortino ratio: Return per unit of downside risk	2.61	4.24	-1.62
Omega ratio: Gain probability vs. loss probability	1.31	1.59	-0.28
Calmar ratio: Return relative to maximum drawdown	2.32	3.54	-1.22
Martin ratio: Return relative to average drawdown	6.95	14.16	-7.21

VBITX vs. FYBTX - Sharpe Ratio Comparison

The current VBITX Sharpe Ratio is 1.58, which is comparable to the FYBTX Sharpe Ratio of 2.25. The chart below compares the historical Sharpe Ratios of VBITX and FYBTX, 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

VBITX vs. FYBTX - Drawdown Comparison

The maximum VBITX drawdown since its inception was -8.65%, which is greater than FYBTX's maximum drawdown of -6.00%. Use the drawdown chart below to compare losses from any high point for VBITX and FYBTX.

Drawdown Indicators

	VBITX	FYBTX	Difference
Max Drawdown Largest peak-to-trough decline	-8.65%	-6.00%	-2.65%
Max Drawdown (1Y) Largest decline over 1 year	-1.54%	-1.19%	-0.35%
Max Drawdown (3Y) Largest decline over 3 years	-1.54%	-1.19%	-0.35%
Max Drawdown (5Y) Largest decline over 5 years	-8.61%	-6.00%	-2.61%
Max Drawdown (10Y) Largest decline over 10 years	-8.65%	-6.00%	-2.65%
Current Drawdown Current decline from peak	-0.49%	-0.10%	-0.39%
Average Drawdown Average peak-to-trough decline	-1.18%	-0.71%	-0.47%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.52%	0.30%	+0.22%

Volatility

VBITX vs. FYBTX - Volatility Comparison

Vanguard Short-Term Bond Index Fund Institutional Shares (VBITX) has a higher volatility of 0.66% compared to Fidelity Series Short-Term Credit Fund (FYBTX) at 0.49%. This indicates that VBITX's price experiences larger fluctuations and is considered to be riskier than FYBTX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VBITX	FYBTX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.66%	0.49%	+0.17%
Volatility (6M) Calculated over the trailing 6-month period	1.71%	1.38%	+0.33%
Volatility (1Y) Calculated over the trailing 1-year period	2.28%	1.87%	+0.41%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	2.97%	2.20%	+0.77%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	2.41%	1.92%	+0.49%

VBITX vs. FYBTX - Expense Ratio Comparison

VBITX has a 0.05% expense ratio, which is higher than FYBTX's 0.00% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

VBITX vs. FYBTX - Dividend Comparison

VBITX's dividend yield for the trailing twelve months is around 4.03%, less than FYBTX's 4.74% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FYBTX Fidelity Series Short-Term Credit Fund	4.74%	4.66%	3.67%	2.76%	1.26%	1.65%	2.31%	2.72%	2.45%	1.59%	1.24%	0.00%
VBITX Vanguard Short-Term Bond Index Fund Institutional Shares	4.03%	3.85%	3.39%	1.99%	1.48%	1.24%	1.80%	2.26%	2.03%	1.69%	1.52%	1.44%

Frequently Asked Questions

Can I hold both VBITX and FYBTX in my portfolio?

VBITX and FYBTX have a correlation of 0.82, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, VBITX or FYBTX?

VBITX has higher volatility (0.66%) compared to FYBTX (0.49%). In terms of maximum drawdown, VBITX dropped -8.65% vs FYBTX's -6.00%.

Which has better risk-adjusted returns?

FYBTX currently has the higher Sharpe Ratio (2.25 vs 1.58), 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.