£4bn wiped off value of online gambling shares after US law change Around £4 billion was wiped off the value of online gaming stocks today after a controversial move to prevent internet gambling in the United States. Shares in the sector tumbled by as much as 80 per cent as investors reacted with dismay to new laws in the US which ban banks and credit card companies from processing payments to online casinos. The legislation was a major blow for firms such as Party Poker owner PartyGaming and 888 Holdings, which rely heavily on the US for business. The two...