The rules for reporting capital gains and losses have changed dramatically. For the first time, brokers are required to report not only sales proceeds but also, for many transactions, basis and holding period. These rules first applied to shares of stock in 2011. In 2012 they apply to mutual fund shares and dividend reinvestment plans, and in 2014 they apply to bonds and options.
In connection with these new reporting rules, the Treasury issued regulations changing the way averaging applies to mutual funds and, for the first time, making averaging available for dividend reinvestment plans. Various other rules changed also, and the IRS created a new form to relieve some of the burden from the venerable, and overworked, Schedule D.