"If it's a 'yes' vote, then I suspect investment markets around the world will probably celebrate and react positively, even though there's still a lot of uncertainty around Greece," Oliver said.
"If it's 'no' markets will take it negatively, including our sharemarkets."
However, he said markets seemed to be increasingly used to the uncertainty around Greece. The local markets last week were a prime example, opening badly on Monday given the issues in Greece, but finishing down 0.1 per cent, virtually flat for the week.
"It's not as if it's caused a huge rupture in our sharemarket," Oliver said. "I think investors are starting to realise Greece is a special case - it's not indicative of the rest of Europe, so it's hard to see the outcome causing a huge move in either direction."
The same goes for China, whose sharemarket has fallen almost 30 per cent in the past three weeks, after a 150 per cent climb over 12 months.
Dr Oliver said the highs hadn't caused a global economic boom, so it was hard to see the fall having major impact either.
"The background noise is causing volatility for our market but it's not causing huge changes," he said.
- AAP
