Anticipating a rise in flow of black money ahead of upcoming Lok Sabha polls, financial intelligence agencies are keeping a strict watch on transactions in securities.The Central Economic Intelligence Bureau (CEIB), has traced upto 50 cases of illegal flow of money through Private Placement Programme, PPP, which involves offering of securities to select individuals or groups, official sources said. Besides, investment done through Participatory Notes or P-Notes, is also being watched which are being misused to route black money for investment in stock market .A security is any stock, bond, debenture, certificate of interest or participation in any profit-sharing agreement or in any oil, gas, or other mineral royalty or lease among others.The Bureau is coordinating with other agencies includingDirectorate of Revenue Intelligence (DRI), Enforcement Directorate (ED), Income Tax department and Financial Intelligence Unit (FIU) among others in this regard.Meanwhile, market regulator Securities and Exchange Boardof India (SEBI) has also enhanced its surveillance to thwart any attempts by listed companies and others to channelize illicit funds through capital markets or investment schemes for polls.