Many people buy bond funds because they want something safer than shares. Then they are shocked when the fund’s value falls. The word “fixed” in “fixed income” refers to how interest payments are set up — not to a promise that the price will stay steady.
A bank fixed-term savings product you hold to the end date is a different experience. A bond or bond fund bought through an investment account has a market price that can move.
Why prices move
When newer bonds start paying higher interest, older bonds with lower interest often become less attractive unless their price falls. The issuer can still be paying on time. The price moved because market interest rates moved.
Longer-term bonds usually move more when rates change. You do not need complicated formulae to remember that longer usually means more ups and downs in price.
Funds show the movement every day
If you hold an individual bond to the end date, you may not look at day-to-day prices. Bond funds publish a price regularly, so rate moves show up in your balance even if you do not sell. That can be unsettling if you expected “safe” to mean “unchanging.”
Choosing on purpose
Need a known amount on a known date? Bank fixed savings are usually clearer. Want bond investments inside a longer-term portfolio? That can make sense if you accept price moves and read the basics on the factsheet — including how sensitive the fund is to interest-rate changes, and what fees you pay.
Do not buy a bond fund only because shares had a scary month and “bond” sounded calming. Check whether it can scare you next.