Global economic forces have a significant impact on Singapore's economy through push and pull factors. When economies struggle, asset values decline and people are endangered, prompting policymakers to intervene to boost asset prices and stimulate growth. For instance, quantitative easing by the US Federal Reserve pushes up inflation in Singapore by increasing food and energy costs. China's massive credit expansion following its near-crisis in 2009 drove up global commodity prices and Singapore property values as Chinese investors sought properties abroad. While Singapore tries to manage external influences, there is only so much it can do, and wise investors will accurately predict and profit from actions by policymakers to reflate economies through new credit.