The S&P/ASX200 fell 18.2 points, or 0.21 per cent, to 8,505.5, as the broader All Ordinaries lost 17.9 points, or 0.2 per cent, to 8,723.5.
Over the week, the top-200 stocks fell roughly 0.5 per cent.
The slump came after six sessions of surging oil prices amid escalating Israel-Iran conflict and as US President Donald Trump flagged potential American military involvement within two weeks.
The broader investor uncertainty then collided with heavy falls in big miners after weak economic data from China, as Rio Tinto plummeted to its lowest close since 2022, IG Markets analyst Tony Sycamore told AAP.
Five of 11 local sectors sectors improved on Friday, but a whopping 4.4 per cent drop in materials stocks over the week weighed on the bourse.
"The big concern for the ASX200 going into the new financial year is the elevated valuations around these banks and that no one wants to touch these big miners," Mr Sycamore said.
"There's been 23 months of falling house prices in China, and that doesn't augur well for the price of iron ore or for the price of the big miners, which remain an influential part of the index."
Financials slipped 0.6 per cent on Friday to finish roughly flat for a second week, a day after CBA etched its latest record high of $183.31 a share.
All four big banks closed in the red, with ANZ facing the sharpest decline with a 2.5 per cent slip to $28.39.
In banking news, former federal coalition finance minister Simon Birmingham was appointed the Australian Banking Association's chief executive, replacing Anna Bligh after eight years at the helm.
Australian energy stocks have had a massive week, surging almost 11 per cent since Israel launched air strikes on Iran last Friday.
Woodside is up 7.7 per cent over the same period, while Santos has rallied 12 per cent.Â
Oil prices hit their highest levels since January overnight as the conflict raged on, but eased to $US75.24 a barrel after Mr Trump's two-week decision window relieved fears of an immediate US attack.
The IT sector had a surprisingly good week despite broader risk-off sentiment, edging 0.3 per cent higher since Monday's open.
The Australian dollar is buying 64.76 US cents, up slightly from 64.71 US cents on Thursday at 5pm, coiling tightly near the mid-level of its recent range with the greenback.
Looking ahead, while the Middle East conflict is likely to dominate headlines, it's also a massive week for macroeconomic data.
Investors will be poring over local inflation figures, US economic growth, and manufacturing data for four of the world's seven largest economies.
ON THE ASX:
* The benchmark S&P/ASX200 index finished Friday 18.2 points lower, or down 0.21 per cent, to 8,505.5
* The broader All Ordinaries lost 17.9 points, or 0.2 per cent, to 8,723.5
CURRENCY SNAPSHOT:
One Australian dollar buys:
* 64.76 US cents, from 64.71 US cents on Thursday at 5pm
* 94.13 Japanese yen, from 93.99 Japanese yen
* 56.24 Euro cents, from 56.43 Euro cents
* 48.09 British pence, from 48.27 pence
* 108.05 NZ cents, from 108.34 NZ cents
6°C