SDI Limited provided earnings guidance for the six months ending 31 December 2018. For the period, the company expects the revised unaudited after-tax profit to be in the range of $2.8 million to $3.1 million, compared to $1.2 million for the same period last year. The revised guidance is driven by stronger than forecasted sales from Australian direct export sales and the favourable closing currency rates at 31 December 2018.