Exclusive: Goldman props own money-market funds with $1 billion after heavy withdrawals

(Reuters) - Goldman Sachs Group Inc had to prop up two of its prime money-market portfolios this past week with more than $1 billion in capital due to heavy investor withdrawals, according to a disclosure filing with the U.S. securities regulator.The Wall Street bank purchased $722.4 million in assets from its Goldman Sachs Financial Square Money Market Fund and $301.2 million from its Goldman Sachs Fund Square Prime Obligations Fund.Its support came as markets had another violently volatile..