FLIA vs. MBB
FLIA (Franklin Liberty International Aggregate Bond ETF) and MBB (iShares MBS Bond ETF) are both exchange-traded funds - FLIA is a International Government Bonds fund actively managed by Franklin Templeton, while MBB is a Mortgage Backed Securities fund tracking the Bloomberg U.S. MBS Index. FLIA is actively managed, while MBB is passively managed. Over the past 5 years, FLIA returned 0.63%/yr vs 0.08%/yr for MBB. Their 0.53 correlation means they have sometimes moved together and sometimes differently. FLIA charges 0.25%/yr vs 0.04%/yr for MBB.
Performance
FLIA vs. MBB - Performance Comparison
Loading charts...
Returns By Period
In the year-to-date period, FLIA achieves a 0.92% return, which is significantly higher than MBB's -0.34% return.
FLIA
- 1D
- -0.22%
- 1M
- -0.76%
- 6M
- 0.27%
- YTD
- 0.92%
- 1Y
- 1.38%
- 3Y*
- 3.45%
- 5Y*
- 0.63%
- 10Y*
- —
- ALL TIME*
- 1.07%
MBB
- 1D
- -0.40%
- 1M
- -1.29%
- 6M
- -0.83%
- YTD
- -0.34%
- 1Y
- 3.08%
- 3Y*
- 4.35%
- 5Y*
- 0.08%
- 10Y*
- 1.15%
- ALL TIME*
- 2.61%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $1.86M | $2.64M | $2.21M | |
| $206.11M | $186.95M | $205.58M |
FLIA vs. MBB - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | |
|---|---|---|---|---|---|---|---|---|---|
FLIA Franklin Liberty International Aggregate Bond ETF | 0.92% | 2.12% | 2.42% | 7.17% | -7.68% | -1.98% | 1.37% | 7.58% | -2.32% |
MBB iShares MBS Bond ETF | -0.34% | 8.38% | 1.31% | 5.01% | -11.74% | -1.43% | 4.08% | 6.18% | 2.04% |
Correlation
The correlation between FLIA and MBB is 0.68, 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. | 0.68 |
Correlation (3Y) Balances recent behavior with more history. | 0.63 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.64 |
Correlation (All Time) Calculated using the full available price history since Jun 1, 2018 | 0.53 |
The correlation between FLIA and MBB shifts across timeframes, from 0.53 (all time) to 0.68 (1 year), reflecting how their relationship changes across market environments.
Compare stocks, funds, or ETFs
Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.
Return for Risk
FLIA vs. MBB — Risk / Return Rank
FLIA
MBB
FLIA vs. MBB - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Franklin Liberty International Aggregate Bond ETF (FLIA) and iShares MBS Bond ETF (MBB). 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.
| FLIA | MBB | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.39 | ||
| Sortino ratioReturn per unit of downside risk | -0.57 | ||
| Omega ratioGain probability vs. loss probability | 1.10 | 1.17 | -0.07 |
| Calmar ratioReturn relative to maximum drawdown | 0.87 | 1.42 | -0.55 |
| Martin ratioReturn relative to average drawdown | 2.29 | 3.92 | -1.63 |
Loading charts...
Drawdowns
FLIA vs. MBB - Drawdown Comparison
The maximum FLIA drawdown since its inception was -11.24%, smaller than the maximum MBB drawdown of -17.64%. Use the drawdown chart below to compare losses from any high point for FLIA and MBB.
Loading charts...
Drawdown Indicators
| FLIA | MBB | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -11.24% | -17.64% | +6.40% |
Max Drawdown (1Y)Largest decline over 1 year | -2.04% | -2.94% | +0.90% |
Max Drawdown (3Y)Largest decline over 3 years | -2.28% | -6.40% | +4.12% |
Max Drawdown (5Y)Largest decline over 5 years | -9.42% | -17.19% | +7.77% |
Max Drawdown (10Y)Largest decline over 10 years | — | -17.64% | — |
Current DrawdownCurrent decline from peak | -0.99% | -2.42% | +1.43% |
Average DrawdownAverage peak-to-trough decline | -3.73% | -2.34% | -1.39% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.77% | 1.07% | -0.30% |
Volatility
FLIA vs. MBB - Volatility Comparison
The current volatility for Franklin Liberty International Aggregate Bond ETF (FLIA) is 0.88%, while iShares MBS Bond ETF (MBB) has a volatility of 1.29%. This indicates that FLIA experiences smaller price fluctuations and is considered to be less risky than MBB based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
Loading charts...
Volatility by Period
| FLIA | MBB | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.88% | 1.29% | -0.41% |
Volatility (6M)Calculated over the trailing 6-month period | 2.59% | 3.47% | -0.88% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.24% | 4.44% | -1.20% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 4.42% | 6.85% | -2.43% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 4.68% | 5.33% | -0.65% |
FLIA vs. MBB - Expense Ratio Comparison
FLIA has a 0.25% expense ratio, which is higher than MBB's 0.04% 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
FLIA vs. MBB - Dividend Comparison
FLIA's dividend yield for the trailing twelve months is around 2.80%, less than MBB's 4.34% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
FLIA Franklin Liberty International Aggregate Bond ETF | 2.71% | 2.62% | 2.97% | 0.93% | 18.12% | 2.26% | 0.43% | 2.93% | 1.23% | 0.00% | 0.00% | 0.00% |
MBB iShares MBS Bond ETF | 3.98% | 4.21% | 3.94% | 3.40% | 2.31% | 1.05% | 2.10% | 2.77% | 2.64% | 2.23% | 2.58% | 2.66% |
Frequently Asked Questions
FLIA and MBB have a correlation of 0.68, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
MBB has higher volatility (1.29%) compared to FLIA (0.88%). In terms of maximum drawdown, FLIA dropped -11.24% vs MBB's -17.64%.
On 5-year performance, FLIA leads with 0.63% vs 0.08% for MBB. On fees, MBB is cheaper at 0.04% per year. On volatility, FLIA has been the lower-risk option at 0.88%. The better choice depends on whether you care most about return, fees, risk, or income.
Over the 5-year period, FLIA has performed better with a 0.63% return vs 0.08%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
MBB is cheaper with a 0.04% expense ratio, compared with 0.25% for FLIA.
MBB has the higher dividend yield at 3.98%, compared with 2.71% for FLIA.
FLIA is categorized as International Government Bonds, while MBB is Mortgage Backed Securities. They also come from different issuers: Franklin Templeton and iShares. Their fees differ too: 0.25% for FLIA and 0.04% for MBB.
MBB currently has the higher Sharpe Ratio (0.94 vs 0.55), 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.
Find the right allocation for FLIA and MBB
Add both to a portfolio and optimize allocations for your target — whether that's maximizing returns, minimizing drawdowns, or balancing risk across holdings.
Open Portfolio Optimizer