The Brazil independent, already hit hard by a management shakeup that displaced its chief executive and another top boss, was trading down 19.2% in Sao Paulo at midday, according to the Bovespa bourse.
After rumours of disappointing results, HRT confirmed Monday night that it saw some oil shows but not commercial volumes at its Wingat-1 well, drilled to 5000 metres in the Walvis Basin off Namibia.
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