India, Sept. 8 -- GrafTech International Ltd. (EAF) shares are currently trading at $7.20, up $1.00, or 16.13 percent on Tuesday, after the graphite electrode manufacturer announced a minimum 30 percent price increase for all open commercial negotiations, effective immediately.

GrafTech closed the previous session at $6.20 and opened at $7.11 on the New York Stock Exchange. The stock has traded between $6.95 and $7.60, with volume at 527,020 shares, compared with average volume of 340,538. Its 52-week range is $4.92 to $20.32.

The company said graphite electrode prices have fallen considerably over the past three years, while raw material, energy and logistics costs have increased. GrafTech has responded with workforce reductions, capacit...