Why Interactive Brokers Stock Tumbled on Tuesday

Interactive Brokers stock fell 6% after UBS analyst Michael Brown downgraded it to neutral from buy, citing valuation concerns. While Brown praised the company as a 'best-in-class broker' with strong growth prospects and new products, he noted the stock's 39x earnings valuation appears stretched for a company expected to grow earnings by low double digits. The stock has still outperformed the broader market significantly over the past year.