HEG, Graphite India Shares Surge On Heavy Trading Volumes HEG, Graphite India Shares Surge On Heavy Trading Volumes Shares of graphite electrode makers HEG Ltd and Graphite India were witnessing strong buying interest in an otherwise subdued session. Graphite India and HEG shares were in huge demand on the exchanges. Shares of graphite electrode makers HEG Ltd and Graphite India were witnessing strong buying interest in an otherwise subdued session on the back of heavy trading volumes. HEG shares rose as much as 14.12 per cent to hit fresh 52-week high of Rs 1,756 and Graphite India climbed 8.58 per cent to hit an all-time high of Rs 584.80.