Silicon Valley Anxious as Tech Stocks Tumble Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email Global oil prices are falling and Chinese leaders are scrambling as their economy buckles, but the stock market's recent tumble has also uncovered problems in Silicon Valley. ( drante / Getty ) Produced by Jillian Weinberger Produced by PRI and WNYC