From the Wall Street Journal’s "Bond Yields Near Three-Year Highs, Weighing on Stock Futures" in Monday's Wall Street Journal:
U.S. stock futures wavered and bond yields rose near their highest level in three years as investors prepared for a campaign of interest-rate increases from the Federal Reserve...
Treasury yields set a floor on interest rates across the economy and are a key input in financial models investors use to value stocks and other investments. Rising yields typically weigh on tech stocks in particular, because the ability to get higher risk-free returns from bonds tends to make investors less interested in companies that are valued for their more distant earnings potential.
In premarket trading, shares of Apple fell 1.8% and Twitter edged 0.6% lower.
Charts: Yahoo!Finance sees a bullish Williams %R pattern. Max pain has moved up to $170 with a call mountain at $180.