The most effective option for the Japanese economy is the suspending the consumption tax increase (scheduled for April, 2017)
Overall, Argentina is not the economy we follow that closely; however, as concerns Brazil, we have seen quite a large rally in Brazilian assets on expectations that Rousseff is going to be impeached.
I do not think that oil is going to fall below $30 per barrel, that would be too bearish; however, I would not be surprised to see some pullbacks in prices, perhaps to below $40.