RBS stake sale dents FTSE 100, rising pound bites

Royal Bank of Scotland weighed on Britain's FTSE 100 on Tuesday after the government took a loss selling a stake in the bank, while a rising pound after strong services data piled extra pressure on the internationally-exposed index.The top share index closed down 0.7 percent as strong data in the services sector pushed sterling higher and weighed ondollar earners.Shares in RBS fell 5.1 percent after the government sold 7.7 percent of the lender for 2.5 billion pounds ($3.33 billion), realizing a