Finance officials from the G20 group of world economic powers expressed concern about the risks of market and exchange rate volatility.
Low oil prices normally help grease the wheels of business and spur global economic growth, but Moody's said it would not revise its forecasts for the G20,.
The world's top 20 economies expressed determination to raise global growth but struggled to overcome divisions over the most suitable methods .
International Monetary Fund chief Christine Lagarde urged the Group of 20 major economies to fulfill their pledges to revive the faltering global economy.
Four Russian navy ships that appeared off Australia's northern coast amid heightened tensions ahead of the G20 summit have now left.
Russia said it hopes its ties with the EU had not yet crossed the point of no return over the Ukraine crisis.
Most of the world's powerhouse leaders arriving in Brisbane for the G20 summit to relax at their luxury hotels, but not Angela Merkel who opted for the pub.
President Barack Obama said the United States cannot "carry the world economy on our back" and urged G20 leaders to work harder to create jobs by revving up growth.
The fall in oil prices to their lowest levels in more than three years should give a boost to the sagging world economy, the International Monetary Fund said.
Pope Francis has called on G20 leaders not to forget the poor, saying to do so would be "regrettable".
Leading world economies are spending $88 billion (71 billion euros) a year in fossil fuel exploration subsidies.
A global infrastructure hub proposed by G20 nations to help strengthen economic growth will be based in Sydney and funded by Australia.
Prime Minister vowed to "shirtfront", or confront, Russian President at the G20 summit next month over the loss of Australian lives in the MH17 crash.
Finance chiefs of the Group of 20 economic powers said they remained confident about the global economy, despite renewed weakness in areas like the eurozone.
Finance chiefs from G20 nations held talks confident they can "change the destiny of the global economy" despite rising world political tensions.
Vladimir Putin is set to attend the G20 leaders' summit in November despite alarm over Russia's actions in Ukraine with host Australia.
Switzerland has claimed the top spot on the Global Innovation Index for the fourth-straight year while Sub-Saharan Africa "posted significant regional improvement".
Reforms proposed to lift global growth in line with a target set by the world's biggest economies earlier this year are so far falling short, Australian Treasurer Joe Hockey said.
She might be one of the most powerful women in the world but that didn't wash with security at the G20 in Sydney who reportedly asked Janet Yellen to show her ID.
The OECD Friday said the winding down of US monetary stimulus should be a "wake-up call" for emerging economies to accelerate reforms, but Indonesia and South Africa stepped up criticism of the Federal Reserve heading into G20 talks.
- Asia Pacific
- Angela Merkel
- Barack Obama
- Vladimir Putin
- South Korea
- United States