** Construction company CSW Industrials' CSWI.O shares down 8% at $291 in early trading
** Co increases stock offering to 1.1 mln shares at $285/shr from prior 1 mln shares
** The price represents a 10% downside to the stock's last close
** CSWI says will use proceeds from the offering to repay outstanding debt, with the remainder for general corporate purposes, including potential future acquisitions
** YTD, CSWI up 52.71% as of last close
(Reporting by Anshuman Tripathy in Bengaluru)