Definition: In this task, you're given a short article. Your job is to classify the article based on its category. Use the following classification labels, 0. World, 1. Sports, 2. Business, 3. Science or Technical. Label the text "0" if it contains information related to world. Label the text "1" if it contains information related to sports. Label the text "2" if it contains information related business. Label the text "3" if it contains science or technical related information. 
Input: Company: Ameritrade Hldg Corp New With presidential election-related uncertainty safely in the past, retail investors have returned to the US stock market with gusto, and they #39;re likely to stay engaged, several trading companies said Friday.
