Global stock markets have slumped overnight as concern about the health of the banking sector has resurfaced with the latest concerns centring on Swiss bank Credit Suisse
Credit Suisse bank shares have fallen as much as 25 percent to a new record low for the second consecutive day.
European markets are down more than 3 percent and Tuesday's gains on Wall Street have reversed.
Bloomberg senior markets editor John Authers spoke to Corin Dann.
