NEW YORK, Nov 5 (Reuters) - The amount invested in U.S. stock funds declined by $3.8 billion in the week ended Wednesday, the third straight week of outflows, according to Lipper. Taxable bond funds saw an outflow of $3.8 billion during the period, the biggest such weekly outflow in seven months, Lipper data showed on Thursday. U.S.-based money market funds posted a $15.7 billion outflow in the latest week, their 15th week in a row of outflows.