Classify the given a piece of financial news into three classes: positive, negative, and neutral. Output must be 'positive', 'negative', or 'neutral'.

Ex Input:
S&P has kept its '' sell '' rating , while Nordea and UBS have reaffirmed their '' buy '' recommendations .

Ex Output:
neutral

Ex Input:
Both operating profit and turnover for the six-month period increased , respectively , from EUR17 .6 m and EUR1149 .9 m , as compared to the corresponding period in 2007 .

Ex Output:
positive

Ex Input:
The operating margin of Aker Yards Cruise & Ferries division went down from 8.3 % to 6.4 % in the first quarter of 2007 .

Ex Output:
negative