** Rio Tinto shares fall as much as 4.8 pct toA$77.25, its lowest level in two weeks** Stock trading ex-dividend** Posts biggest intra-day pct decline since April, 2017** About 3.1 mln shares change hands, compared with the30-day average trading volume of about 2.3 million shares** Rio shares biggest drag on the Australian main board (Reuters Messaging:rushil.dutta.thomsonreuters.com@reuters.net) Disclaimer: The views expressed in this article are those of the author and may not reflect those of Kitco Metals Inc. The author has made every effort to ensure accuracy of information provided; however, neither Kitco Metals Inc. nor the author can guarantee such accuracy. This article is strictly for informational purposes only. It is not a solicitation to make any exchange in commodities, securities or other financial instruments. Kitco Metals Inc. and the author of this article do not accept culpability for losses and/ or damages arising from the use of this publication.