BUZZ-Australia's Aguia Resources up after investor raises stake
** Fertiliser developer Aguia Resources Ltd rises as much as 6.2 pct to highest since May 27
** Company reports that its strategic investor, Sulliden Mining Capital Ltd has increased its shareholding in the company to 16.84 pct from 15.75 pct
** Also confirms that its preliminary economic assessment for the Tres Estradas project is expected to be released in July
** Company's current ROE of -44.62 pct is lower than sector average of -42.11 pct (Reuters Messaging: firstname.lastname@example.org)
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