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

Input: Consider Input: At 1411 CET , ArcelorMittal had lost 7.26 % to EUR 17.38 on Euronext Paris , coming at the lead of the blue-chip fallers .

Output: negative

Input: Consider Input: '' Residentialconstruction in particular has picked up in several markets .

Output: positive

Input: Consider Input: Finnish Okmetic that manufactures and processes silicon wafers for the semiconductor and sensor industries and Norwegian solar wafer company NorSun have signed a contract under which Okmetic will supply NorSun mono silicon crystals for use in solar cell manufacturing .
Output: positive