NEW YORK (TheStreet) — Stocks were slightly lower on Friday following a massive rally a day earlier in response to the European Central Bank's quantitative easing plans. UPS and FedEx dragged the S&P 500 lower after UPS slashed its 2015 guidance as expenses climbed during peak season. UPS said Friday it expects full-year profit growth slightly less than its target of 9% to 13%. UPS shares slid …
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