Root of investor anxiety: Uncertainty

MAJOR global share markets are in turmoil but what is causing it? Slowing growth in China? An imminent US interest rise?

FEARS about China's slowdown and a coming US interest rate rise have sent global stock markets into a fidgety freefall.

BUT why? China's economy has been slowing for years. And the Federal Reserve has long been expected to raise short-term interest rates from near zero, where it's kept them since 2008. So what's sowing panic now?