The investigation is only the fifth time such a commission has been established in Switzerland's modern history.
It comes after two sub-committees supported a deeper investigation into how the government, Swiss central bank and financial market regulator acted in the run up to the emergency rescue of Credit Suisse.
Under the rescue deal, UBS (UBSG.S) agreed to buy Credit Suisse, marking the first rescue of a global bank since the 2008 financial crisis.
The government has provided the banks with 109 billion Swiss francs ($120.32 billion) in financial guarantees to ease the deal, causing widespread uproar in Switzerland.
($1 = 0.9059 Swiss francs)Reporting by Noele Illien, editing by John RevillOur Standards: The Thomson Reuters Trust Principles.
Persons:
Noele Illien, John Revill
Organizations:
Swiss, Credit Suisse, UBS, Thomson
Locations:
ZURICH, Swiss, Switzerland