The new bank bought the location of the current building in 1830.
Banks went to the bar first, bought two more and sat down.
The last pass was on May 31, when the central bank bought about $4.5 billion of bills.
Most banks, he said, are buying their stock at well above book value.
It would increase 22 percent if a larger bank bought a smaller one.
Many experts, however, said the central banks may not have bought themselves that much time.
But to the researchers' surprise, a large bank bought a system, too.
There have long been whispers that the bank might buy such a business in a huge deal.
Since December 1998, the bank has bought back about 18 million shares.
At least 13 central banks bought dollars in the foreign exchange market.