Most funds measure themselves against a market index. But open the documents of many halal income funds and you will find a different yardstick: CPI plus a margin. Not “beat the market” – beat inflation, by a stated amount. It is a quietly radical way to define success.

CPI is the Consumer Price Index, compiled by the Australian Bureau of Statistics as the country’s standard measure of inflation, with the headline series published quarterly. When a fund targets, say, CPI plus three per cent, it is promising something concrete: that your money should grow faster than the cost of living by that margin. Everything above CPI is real return – growth in what your money can actually buy.

Everything above CPI is real return: growth in what your money can actually buy.

Why choose inflation as the yardstick? Partly because the assets in halal income funds – property, financing arrangements, sukuk – do not map neatly onto conventional bond indices, and partly because most licensed market indices carry constraints of their own. A CPI based target is transparent, independently published and directly meaningful to the investor: it is your grocery bill, formalised.

But an absolute benchmark reads differently from a market one, and the difference matters. A share fund trailing its index in a crash may still have done respectable work in context. A fund targeting CPI plus three has no such context to lean on – the target does not fall when markets do, which makes it a demanding master in bad years and a modest one in booming years.

Two reading habits keep the comparison honest. Check the period: annual inflation is properly measured against the quarterly year on year figure, and small differences in the series used can move the goalposts. And check the record over the years, not quarters – a CPI plus target is a marathon pace, and only the long run reveals whether the fund is actually keeping it.

THE SHORT VERSION

  • A CPI plus benchmark promises growth in purchasing power – the margin above inflation is your real return.
  • The ABS publishes the headline CPI series quarterly; the period and series used determine whether comparisons are fair.
  • Absolute targets do not fall when markets do – judge the record over years, not single quarters.