** Shares of Oncosil Medical fall as much as 26.9% to A$0.01, their lowest since Aug. 12
** Stock marks its weakest trading session since April 23
** Medical device maker says it has commitments for a placement of A$7 mln ($4.62 mln) at A$0.01 per share, and proposes to undertake a share purchase plan to raise about A$1 mln at the same price
** Offer price at a 23.1% discounts to its last close on Oct. 23, before a trading halt was placed
** About 32 mln shares change hands, compared with the 30-day average volume of 6.8 mln
** Stock has risen 17.6% YTD
($1 = 1.5142 Australian dollars)
(Reporting by Sneha Kumar in Bengaluru)
((Sneha.Kumar@thomsonreuters.com;))