The Aussie dollar is a haven amid markets in turmoil. Photo: Virginia Star

IF THE rise of China and the demise of the US dollar continue apace, the Australian dollar will run to dangerous new heights. The Aussie dollar was floated in 1982. In its youth, “the Aussie”, as it is known on foreign exchange markets, was a “dollar-bloc” currency, mostly moving in tandem with the greenback and the Canadian dollar.

By 2003, however, and now in its 20s, the $A became more aligned with the fortunes of China. It became known in recent years as a “risk trade” – that is, a currency that waxes in the good times then wanes when things get rocky on the global economic front.

But things have changed lately. The $A has finally left home. Although risk on global markets has risen, the $A has hardly been marked down like it used to be at the first whiff of volatility.

Now in its adulthood, the currency, although still a fully fledged proxy for Asian growth, has taken on something of a safe-haven complexion.

As the spectre of a US debt default has rattled bond and sharemarkets worldwide, the $A has actually risen. Whether this is a momentary or a lasting phenomenon, only time will tell.

But the implications for Australia of a permanently high currency – and this assumes that China will not blow up for some time, which is a decent-sized “if” – are profound. We are talking the destruction of entire industries under the weight of prohibitive export prices. That subject is for another day. Meanwhile, just to respond to claims of mischief: an online article by yours truly yesterday said the $A was headed to $US1.50 should the relentless rise of China and its insatiable demand for our commodities persist.

This was only a forecast with a caveat inextricably attached – that is China.

It would seem obvious that if the terms of trade keep rising in this country’s favour, and the unprecedented boom proceeds on the present trajectory, then the $A will keep rising. A rate of $US1.50 then is plausible; indeed just as plausible, over time, as the $A plunging back to US60¢ should boom quickly turn to bust.

For foreign investors, there is nowhere to turn. The $US is getting a thrashing as investors lose confidence in America. Lately, there might have been a flight of capital into the euro, yet Europe is in disarray itself as Greece heads for inevitable default and other euro members teeter. The yen has risen, though Japan’s post-growth economy makes it a less than appetising destination for capital.

There is the Swiss franc, which has shot the lights out as a “safe haven”. But this small European tax refuge has a case of capital-overload. So, the Aussie, rather than being sold off in the turmoil of recent weeks, has pushed to new highs. Reserve Bank Governor Glenn Stevens noted recently that other central banks had been buying the $A. It’s a proxy for commodities, Australia’s debt-to-GDP ratio is low, and our interest rates are high. And privately, Stevens, despite the pain for exporters, is happy to have the $A high.

It keeps a lid on growth, and inflation, and saves him having to hoist interest rates any further and hurt the mortgage belt.

Now, more than ever a proxy for China, the $A has broken links with its dollar-bloc mentor, the greenback.

But it is also proving resilient like never before – and this is the essential change in its character – even as instability has taken a grip on the world economic stage.

As much as anything, the strong currency is down to high interest rates. Whereas rates in the US, Japan and Europe remain depressed, the base rate here at 4.75 per cent is the highest in the developed world. This interest rate differential attracts foreign investors. They chase the high rates in fixed interest markets, the rising $A.

As long as commodities keep rising, inflationary pressures will continue and rates here will stay higher than the rest of the world.

Then there’s the most recent trade numbers, for the June quarter. The “terms of trade” rose 5.3 per cent to the highest since records began in the 1870s. We cannot underestimate the potency of this metric. The terms of trade is the measure of export to import prices; how well Australia does versus the rest of the world on the basis of relative prices.

It was the pastoral business and agriculture, wool and wheat, that delivered this nation’s wealth last century. It brought us our standard of living. Now, it’s coal and iron ore, gold and base metals.

The Reserve Bank estimates that for every year the terms of trade stays at these levels, it is worth some 12 per cent to 15 per cent of Australia’s $1.3 trillion annual economic output – up to $200 billion.

And so it is that, as long as China keeps on and commodity prices keep pushing higher, the $A too will keep rising. In the US, as they keep printing money the value of the greenback declines. And they like it this way, as it devalues the size of their debt.

With the US economy, and its currency, in terminal decline, the Aussie will continue to appreciate, but only as long as China holds. And that, once again, is a sizeable “if”.