Median client accounts at registered investment advisory (RIA) firms offering financial planning services grew at a slower pace than the S&P 500 last year, reported Financial Planning, citing a recent report by SmartAsset. The study, which analyzed Form ADV filings from firms registered with the Securities and Exchange Commission (SEC) as of November, found that the median client account size at RIA firms matching SmartAsset's criteria rose by 10.3 precent, reaching $426,662. In comparison, the S&P 500 experienced a much stronger growth rate, surging by approximately 30 percent over the same period. The rankings, compiled by SmartAsset, highlight the largest average account sizes within the RIA cha