More evidence is out that the ongoing rally in the stock market today is helping to boost retirement prospects for millions of Americans. Retirement account balances rose 10% from 2010 to 2013, according to a new report by the Federal Reserve. The Fed’s September Bulletin, looking at American households’ finances, shows that the average balance in retirement accounts — including IRAs and 401(k)s — hit $201,300 at the end of last year.