US STOCKS-S&P 500, Nasdaq dip on Yellen's comments; Apple up late

* Yellen, Fed policymakers: Some U.S. stock valuations 'stretched'
Data & News supplied by www.cloudquote.io
Stock quotes supplied by Barchart
Quotes delayed at least 20 minutes.
By accessing this page, you agree to the following
Privacy Policy and Terms and Conditions.