now the world economy is in a phase of history has never seen before

I think now the world economy is in a phase of history has never seen before. The economies are tightly connected, but not in a unified path. Whether the Fed will raise interest rates is the main source of uncertainty in the current economic volatility. Strong US employment data and the low interest rate hike decision support; however, low inflation and concerns about China's economic slowdown make people feel it is not the right time to raise interest rates. The complexity of the world economy has also caused by people's expectations of future disagreements. Most developed countries have recovered from the financial crisis; however, some issues remain unresolved, such as Greece's debt. In addition, the world's second largest economy, China, is expected to have a low growth rate this year. The public opinion is more dominated by the pessimistic expectations. I believe that if more positive news released, the Federal Reserve will raise interest rates before the end of this year, releasing space for future monetary stimulus. However, if there is no more positive news, the act of raising rates may be the last straw that breaks the world financial markets.