(Bloomberg) -- Wall Street gambled — and lost — on a $1.64 billion loan for a lottery company backed by a Czech billionaire to fund a majority stake in a fantasy sports operator in Atlanta.The loan to Allwyn fell prey to more discriminating credit markets, and after raising just $1 billion from institutional investors, banks including Goldman Sachs Group Inc. and Deutsche Bank AG had to step in to make up the shortfall — and ended up sharing $500 million of the debt on their own balance sheets, according to ...