PBBBX vs. VSTBX
PBBBX (PIA BBB Bond Fund) and VSTBX (Vanguard Short-Term Corporate Bond Index Fund Institutional Shares) are both Corporate Bonds funds. Over the past 10 years, PBBBX returned 2.82%/yr vs 2.97%/yr for VSTBX. A 0.78 correlation means they provide meaningful diversification when combined. PBBBX charges 0.15%/yr vs 0.05%/yr for VSTBX.
Performance
PBBBX vs. VSTBX - Performance Comparison
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Returns By Period
In the year-to-date period, PBBBX achieves a 0.25% return, which is significantly lower than VSTBX's 0.66% return. Over the past 10 years, PBBBX has underperformed VSTBX with an annualized return of 2.82%, while VSTBX has yielded a comparatively higher 2.97% annualized return.
PBBBX
- 1D
- -0.35%
- 1M
- 0.81%
- YTD
- 0.25%
- 6M
- 0.56%
- 1Y
- 4.93%
- 3Y*
- 5.45%
- 5Y*
- 0.41%
- 10Y*
- 2.82%
VSTBX
- 1D
- -0.08%
- 1M
- 0.26%
- YTD
- 0.66%
- 6M
- 0.85%
- 1Y
- 4.03%
- 3Y*
- 5.68%
- 5Y*
- 2.43%
- 10Y*
- 2.97%
PBBBX vs. VSTBX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
PBBBX PIA BBB Bond Fund | 0.25% | 8.14% | 2.41% | 9.19% | -16.35% | -1.20% | 9.37% | 16.49% | -3.02% | 7.16% |
VSTBX Vanguard Short-Term Corporate Bond Index Fund Institutional Shares | 0.66% | 6.75% | 5.37% | 6.17% | -5.73% | -0.41% | 5.07% | 9.68% | 0.92% | 2.48% |
Correlation
The correlation between PBBBX and VSTBX is 0.78, 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 | 0.78 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.84 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.84 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.79 |
Correlation (All Time) Calculated using the full available price history since Nov 19, 2009 | 0.78 |
The correlation between PBBBX and VSTBX has been stable across timeframes, ranging from 0.78 to 0.84 - a consistent structural relationship.
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Return for Risk
PBBBX vs. VSTBX — Risk / Return Rank
PBBBX
VSTBX
PBBBX vs. VSTBX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for PIA BBB Bond Fund (PBBBX) and Vanguard Short-Term Corporate Bond Index Fund Institutional Shares (VSTBX). 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.
| PBBBX | VSTBX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -1.09 | ||
| Sortino ratioReturn per unit of downside risk | -1.75 | ||
| Omega ratioGain probability vs. loss probability | 1.23 | 1.47 | -0.24 |
| Calmar ratioReturn relative to maximum drawdown | 1.57 | 3.20 | -1.63 |
| Martin ratioReturn relative to average drawdown | 4.74 | 12.56 | -7.82 |
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Drawdowns
PBBBX vs. VSTBX - Drawdown Comparison
The maximum PBBBX drawdown since its inception was -23.00%, which is greater than VSTBX's maximum drawdown of -9.34%. Use the drawdown chart below to compare losses from any high point for PBBBX and VSTBX.
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Drawdown Indicators
| PBBBX | VSTBX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -23.00% | -9.34% | -13.66% |
Max Drawdown (1Y)Largest decline over 1 year | -3.30% | -1.31% | -1.99% |
Max Drawdown (3Y)Largest decline over 3 years | -6.39% | -1.31% | -5.08% |
Max Drawdown (5Y)Largest decline over 5 years | -23.00% | -9.34% | -13.66% |
Max Drawdown (10Y)Largest decline over 10 years | -23.00% | -9.34% | -13.66% |
Current DrawdownCurrent decline from peak | -1.37% | -0.32% | -1.05% |
Average DrawdownAverage peak-to-trough decline | -3.48% | -0.95% | -2.53% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 1.09% | 0.33% | +0.76% |
Volatility
PBBBX vs. VSTBX - Volatility Comparison
PIA BBB Bond Fund (PBBBX) has a higher volatility of 1.16% compared to Vanguard Short-Term Corporate Bond Index Fund Institutional Shares (VSTBX) at 0.63%. This indicates that PBBBX's price experiences larger fluctuations and is considered to be riskier than VSTBX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| PBBBX | VSTBX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.16% | 0.63% | +0.53% |
Volatility (6M)Calculated over the trailing 6-month period | 3.13% | 1.35% | +1.78% |
Volatility (1Y)Calculated over the trailing 1-year period | 4.09% | 1.78% | +2.31% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 6.68% | 2.72% | +3.96% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 6.03% | 2.38% | +3.65% |
PBBBX vs. VSTBX - Expense Ratio Comparison
PBBBX has a 0.15% expense ratio, which is higher than VSTBX's 0.05% 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
PBBBX vs. VSTBX - Dividend Comparison
PBBBX's dividend yield for the trailing twelve months is around 3.79%, less than VSTBX's 4.45% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
PBBBX PIA BBB Bond Fund | 3.79% | 4.02% | 3.82% | 3.57% | 3.24% | 2.85% | 3.16% | 3.78% | 4.20% | 3.75% | 3.95% | 4.12% |
VSTBX Vanguard Short-Term Corporate Bond Index Fund Institutional Shares | 4.45% | 4.34% | 4.29% | 3.09% | 2.00% | 1.80% | 2.27% | 5.40% | 2.67% | 2.27% | 1.96% | 2.25% |
Frequently Asked Questions
PBBBX and VSTBX have a correlation of 0.78, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
PBBBX has higher volatility (1.16%) compared to VSTBX (0.63%). In terms of maximum drawdown, PBBBX dropped -23.00% vs VSTBX's -9.34%.
VSTBX currently has the higher Sharpe Ratio (2.36 vs 1.27), 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.
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