According to historical record, the monarch was killed in battle on Bosworth Field on 22 August, 1485.
A broad rise for the greenback was the main bet of most major investment houses this year.
This comes after more than 500 Britons have left the UK to fight Jihad in Syria and Iraq.
The increase in the threat level is related to developments in Syria and Iraq.
A man has wagered £400,000 in what bookies say is one of the world’s biggest political bets.
The Prime Minister has so far taken a low-profile role in the debate on independence.