A growing number of Americans are transferring their money out of large and mid-sized banks: 9.6 percent moved their money in 2011, up from 8.7 percent the year before, and 7.7 percent two years ago, Housing Wire reports, citing a new study from J.D. Power and Associates. The most popular reason for doing so — cited by a third of those who switched banks — was higher fees. Bank of America’s decision last year to impose debit-card fees was a huge blow to its reputation, for instance. But the Occupy Wall Street movement also seemed to have an impact, at least on the margins.