JOHANNESBURG, July 25 (Reuters) - South African petro-chemicals group Sasol SOLJ.J said on Tuesday it expected its full-year headline earnings to fall as much as 21 percent, hit by lower oil prices and a stronger rand currency.
Sasol said headline earnings per share for the year to end June are expected to decrease by between 11 percent and 21 percent from 41.40 rand ($3.20) in the prior year.
Headline earnings are the main profit gauge in South Africa which strip out certain one-off items.
Sasol will release its full-year results in September.
($1 = 12.9542 rand)