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Businessmen walk past the exterior wall of the headquarters of Switzerland's largest bank, UBS, as the approach Paradeplatz, the symbolic centre of the Swiss banking industry. The Swiss banking industry holds an estimated 4,000 billion Swiss Francs (USD 4,240 billion) in assets, more than half of it foreign, including CHF 880 billion in undeclared European assets alone, benefiting from the country's famous banking secrecy laws.