There was blood on the floor of the share market on Friday with the All Ordinaries index diving nearly 2 per cent and investors dropping $51 billion in market value with the biggest fall in six months.
That gave investors and super fund members a shake up but many mightn’t understand that it represents a fight in the financial markets between central banks and bond investors over inflation. For years central bankers have been in control, pushing interest rates down directly and by ‘quantitive easing’ – in effect printing money – to undermine the cost of money. 
Now the bond markets, the people who supply the long term capital that is largely funding the over $US10 trillion ($12.77 trillion) McKinsey says central banks have spent on stimulus, have hit back, saying they won’t take it anymore. The reason we know that is because across the globe long term interest rates have spiked upwards on the back of fears about inflation.
“Australian 10 year bond rates have jumped from 0.7 per cent in October last year to 1.6 per cent now,” said Laurie Conheady, fixed interest specialist with JB Were. In the US market the rate on 10 year Treasury bonds has gone up to 1.5 per cent and they were 1 per cent earlier in the year.”
There is an inverse reaction between the stock market and long term interest rates. As interest rates kick up markets fall over fears that people will sell shares and buy bonds. 
That process looked like it began yesterday.
“The markets have been spooked by the idea that inflation is going to pick up,” said David Bassanese, chief economist with BetaShares.
“Even the Fed [US Federal Reserve] themselves say that it could pick up in the short term. Currently its only 1.5 per cent but the Fed last week said it was going to break above 2 per cent,” Mr Bassanese said.
The markets are positioning for that shock and its a matter of shoot first and ask questions later,” Mr Bassanese said.
So the outlook for shares depends on whether those predictions of rising inflation come to pass and how sharply it rises.
What surprises and worries observers is how quickly and sharply interest rates have spiked. 
Five year bond yields have jumped about 70 basis points and 10 year bonds 1 per cent in a few months. But RBA governor Phil Lowe hasn’t flinched on short term rates.
In fact he doubled down on recent promises saying he will hold the cash rate at the miserly level of 0.1 per cent till 2024.
Where the fight is
What that means is there’s a battle going on between the hard bitten pros out there in the bond market and Governor Lowe and his international contemporaries over the cost of money.
“The RBA has the ability to print more money and buy more short term bonds to defend its .1 per cent target of the three year bond which they have been doing today [Friday] with $3 billion worth of purchases,” said Shane Oliver, chief economist with AMP Capital.
“They can win that battle but as to who wins the war, it ultimately depends on what happens to the economy and inflation. If the central banks are right and any pickup in inflation is transitory then the RBA can continue on its merry way and not raise interest rates for several years,” Dr Oliver said.
“If that’s not the case then the RBA will be forced to tighten earlier. The bond market is currently pricing in interest rate hikes in the next 18 months,” Dr Oliver said.
But Phil Lowe is prepared to slug it out. Not only did he spend big on Friday, he earlier this month stepped up with another $100 billion for his quantitive easing armoury. He also has another $100 billion or so in the Term Funding Facility he created to ensure the banks had cheap money to lend.
But the bond markets are sticking to their guns also. While the RBA has kept the three year bond rate flat, the four year rate, just outside Dr Lowe’s target, has jumped 75 basis points in four months.
“Long term funding at four to five years is under stress,” said Steve Mickenberger, chief commentator with rate watcher Canstar. “The Term Funding Facility runs out at the end of June. It’s a hard deadline and when its finished the banks will have to fund it through normal operations,” Mr Mickenberger said.
That will be another rate rise pressure Dr Lowe will have to fight. And it’s a battle he has to win because both government and the private sector have record debt and a rise in rates could be catastrophic.
“Everyone’s leveraged up, assuming rates are going to remain very, very low so the high debt levels heighten the market sensitivity to inflation and interest rates,” Mr Bassanese said.
