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Before a ball is even kicked on Sunday, the Clearys and the Arthurs will already have made history.

Together, they will become the first father-son and coach-player combinations to front up against each other in an NRL decider.

Come fulltime, one pair will walk away with further history.

A Penrith win will make Ivan and Nathan the first father-son combination in history to win two titles, backing up last year's success.

Alternatively, the Arthurs can join them and John and Martin Lang as the only other premiership-winning combination if the Eels break their drought.

For Nathan and Ivan, working together in big matches has been a regular occurrence.

"It's sort of become the norm now," Nathan said of playing under his father.

"It's probably not something that you really notice until after the year is done and you reflect.

"I'm very grateful that I'm in this position. It's unique. Just very grateful.

"When it's all said and done and we're probably both retired we can reflect on what it was.

"But at the moment it's just a job."

For Brad and Jake, it's a new phenomenon.

"I'm excited and I'm excited for him," coach Arthur said.

"But I'm sure Ivan's the same. I feel like we've got 17 sons. We're going into this weekend with 17 priorities.

"It's about these guys being a bit more selfish now and playing for themselves. They've put themselves in this position."

Fathers coaching their sons in the NRL is rare before even considering grand finals.

There remain only 12 such instances in the game's 114-year history, while John and Jasmin Strange became the first father-daughter combination in the NRLW this year at the Sydney Roosters.

But the Clearys have long been seen as the leaders in the father-son coaching space in recent years.

After Ivan admitted he faced some challenges in their early days together in 2019, they now hold a 60-18 record together at Penrith.

So much so, that when Brad Arthur went to bring Jake into the Eels' full-time squad last year as playmaking cover, he went straight to Ivan for advice.

"Why wouldn't I reach out for that advice? And to (Ivan and Nathan's) credit, they were excellent," Arthur said.

"It was a tough decision (to bring Jake in).

"I had introduced my son into the team. I consulted with some players as well.

"But I reached out to Ivan and he was great just to give me a bit of advice around it. He'd been there before in terms of coaching his son.

"It's unique. No one ever knows the experience until you actually do it.

"Everyone can say that they they might ... but until you actually do it, you don't know."

Come Sunday night, he and his son could feel something less they know of: winning a premiership.

© AAP 2022

Hopes of a smaller interest rate rise may have been premature with most experts forecasting another 50 basis point hike.

Mortgage holders have endured a cumulative 175 basis points in interest rate hikes since May, causing their monthly repayments to rise by hundreds of dollars.

But 23 of the 39 economists and analysts polled by Finder expect the central bank to lift the cash rate by 50 basis points when it meets on Tuesday.

The Reserve Bank of Australia has maintained it is not on a "pre-set path" to lift rates and tame inflation, with core inflation sitting at 6.2 per cent annual growth for August, as measured by the Australian Bureau of Statistics' experimental monthly inflation index.

This is more than double the RBA's target range of two to three per cent.

Despite the RBA governor indicating the board would be choosing between a lift of 25 and 50 basis points at its October meeting, many economists think the conditions are ripe for a larger increase.

NAB economist Taylor Nugent expected the RBA to hike rates by 50 basis points next week, with the labour market remaining tight and retail sales figures showing the resilience of households.

The central bank was then expected to be "stepping back to a 25bp hike in November and pausing in December" to monitor the economic impact of prior tightening, he said.

Gloomy global conditions are also likely to factor into the bank's decision, with both the US and UK central banks hiking rates sharply last week.

However, many expect the central bank to then take the foot off the accelerator, with 23 out of 39 experts surveyed by Finder expecting the RBA to hold in November.

"I expect the RBA to pause its tightening cycle in November," Ord Minnett's Malcolm Wood said.

"With fiscal tightening from Treasurer Jim Chalmers' first budget, Europe in recession and the US soon to follow, this should end the tightening cycle."

Dr Chalmers said he wouldn't pretend the global outlook was "anything other than a pretty dangerous place right now" as he prepares to deliver his first budget against the backdrop of international partners teetering with recession.

"It's pretty clear that the international situation is deteriorating," he told the ABC's 7:30 program.

The treasurer said he remained upbeat and optimistic about Australia's outlook, with strong economic indicators, but warned of further economic pain in the near future.

"We've got a lot going for us," Dr Chalmers said.

"But we've got some difficult global conditions to navigate in the meantime.

"It's feeding through to higher inflation and falling real wages and rising interest rates at home and that will have an impact on our own growth prospects in the domestic economy."

Another rate hike of 50 basis points would add $760 to monthly repayments - compared to May repayments - on the average $500,000 loan with 25 years left to go, according to an analysis by RateCity.

© AAP 2022

Melissa Caddick's husband has denied playing any role in his wife's disappearance and that he deliberately delayed reporting her missing to buy time or avoid police attention.

Anthony Koletti told the inquest into the fraudster's disappearance and suspected death that he definitely did not assist in her vanishing without a trace.

"Did you delay reporting her missing in order to give her time to try and go somewhere ... or end her own life?" counsel assisting Jason Downing SC said.

"I did not," Mr Koletti said.

Earlier the hairdresser and part-time DJ was again questioned about the day he says Ms Caddick disappeared on November 12, 2022 from their Sydney eastern suburbs home.

That evening he drove to a friend's place in Rose Bay to get an "e-cigarette," he told the NSW Coroners Court.

"Was it in fact to smoke a joint?" Mr Downing asked.

"I don't know ... it's possible," Mr Koletti said.

"You must remember," Mr Downing said.

"Let's just say I did, what's your point?" Mr Koletti said.

"On a night you told us you were conducting searches throughout the day ... you in fact went to smoke a joint with a friend," Mr Downing said.

Mr Koletti said he was concerned about his wife and accepted he smoked weed to calm himself down.

Text messages exchanged with that friend were later deleted by Mr Koletti before he handed his phone over to police to assist with their inquiries, Mr Downing said.

Mr Koletti said doing that must have had "something to do with marijuana".

He formally reported his wife missing the following day on November 13, and was asked if he had been out the night before.

"Not that I know of," he said.

The day she went missing is "all a bit of a blur," Mr Koletti said on Thursday before adding his recollection is "quite hazy".

"I don't recall going anywhere," he said.

In several different police reports and for weeks after Mr Koletti maintained Ms Caddick left the home in black exercise gear and silver Asics.

But after she failed to return he says he assumed she was meeting a lawyer, or staying in a hotel before her court appearance the following day.

Mr Downing asked why he insists she left in athletic wear if he later believed she was meeting a lawyer.

Mr Koletti said it was based on assumptions, but denied seeing her wearing them.

Forensic psychiatrist Dr Kerri Eagle diagnosed Ms Caddick with a "narcissistic personality disorder" but noted the limitations of never having interviewed her and purely based on statements and other records.

Ms Caddick portrayed herself as a highly successful and affluent person and fed her self-esteem through the admiration of others, Dr Eagle told the inquest.

Facing exposure as a fraud and not appearing as brilliant as she projected, if she felt she could not recover from such humiliation she may suddenly feel no other outlet than suicide, Dr Eagle said.

But from her assessments the doctor did not believe she displayed psychopathic or sociopathic tendencies.

Ms Caddick's Ponzi scheme victims, mostly family and friends, lost $20-$30 million she used to fund her lavish lifestyle

In February 2021 her decomposing foot encased in a shoe washed ashore at Bournda Beach on the NSW south coast.

Ms Caddick's brother Adam Grimley has said in an affidavit the family was "floored" counsel assisting seemed to be "going after" his brother-in-law.

He noted counsel seemed to be presenting "unverified gossip as fact" and said Mr Koletti had suffered enormously from the loss of his wife, the shock of her misconduct and unsubstantiated accusations that followed.

Overnight he had received abusive messages including one reading: "Dodgy prick, I hope you get locked up," his lawyer Judy Swan said.

The inquest continues on Friday.

© AAP 2022