The Bond Label Hides Five Different Jobs
“Bonds” sounds like one asset class until you compare a six-month Treasury fund with a long-duration Treasury fund, a high-yield corporate fund and an SGD corporate bond fund. They share a label and can behave very differently.
The bond bucket has three main dials:
- Duration: how sensitive the price is to interest-rate changes.
- Credit: how likely the borrower is to repay.
- Currency: the money your future spending is actually denominated in.
There is no best bond fund in isolation. There is only the bond risk that matches the job.
SHY: Short Government Duration
SHY holds short-dated US Treasury exposure. Its short duration means its price usually reacts less violently to interest-rate changes than TLT.
That makes it closer to a volatility dampener than a long-term return engine. It is still USD exposure, still exposed to interest-rate changes, and still an ETF whose market price can move. “Short” does not mean “cash”.
TLT: Long Government Duration
TLT holds long-dated US Treasury exposure. Long duration gives it more sensitivity to rates: a fall in yields can produce a large price gain, while a rise can produce a large loss.
That sensitivity can help when a recession pushes yields down and equities sell off. It can hurt during an inflation shock or a period of rising rates. TLT is not a savings account and should not be chosen merely because the word Treasury sounds safe.
LQD and HYG: Credit Risk
LQD holds investment-grade corporate bonds. HYG holds high-yield corporate bonds. Both add corporate-credit exposure on top of interest-rate exposure.
High-yield bonds pay more because investors demand compensation for greater default and downgrade risk. In a recession, the same event that hurts equities can also widen corporate-credit spreads. That means HYG may not provide the same shock absorption as high-quality government bonds.
LQD sits higher in the credit-quality spectrum, but it is still not a government bond. Its price reflects both rates and the market's view of corporate borrowers.
MBH: SGD Investment-Grade Credit
MBH.SI is an SGD investment-grade corporate bond ETF. Its SGD trading currency and local-currency exposure can fit a Singapore investor's bond sleeve better than a USD bond fund, especially when the spending goal is in SGD.
It still carries duration, issuer and credit-spread risk. A local currency label does not turn corporate bonds into cash. A35 and Singapore Savings Bonds represent different combinations of government exposure, liquidity and duration, so they are alternatives for some jobs rather than identical substitutes.
Build the Bucket Backwards
Start with the liability:
- Money needed soon belongs in cash, deposits, T-bills or another genuinely liquid reserve.
- Money needed in SGD may be better matched with SGD fixed income than with an unhedged USD bond fund.
- A portfolio that needs recession protection may use high-quality government duration, accepting rate risk.
- Credit funds such as
LQDandHYGare optional risk sleeves, not automatic replacements for the stabilising core.
The Takeaway
The bond bucket is a set of jobs, not a ticker collection. SHY manages short duration, TLT takes long-duration rate risk, LQD and HYG add corporate credit, and MBH.SI brings SGD investment-grade exposure. Choose the risk deliberately, and remember that a bond ETF has no maturity date that guarantees your return.
General education, not financial advice. Fund composition, duration and risk change; verify current factsheets before investing.