Stocks have climbed the wall of worry fairly well so far in 2014, yet investors should not expect a fierce rally in the second half due to stretched valuations, says Kristina Hooper, US Investment Strategist for Allianz Global Investors. Hooper says technology is one of the few areas where multiples remain reasonable on a historic basis, adding that top-line and dividend growth look good for the sector. Finally, she says that the lack of volume and volatility on Wall Street should remind investors to be selective going forward as opposed to a strategy based on the Federal Reserve's loose money policy which is intended to float all boats no matter the quality.