The document summarizes olefin market trends in Asia in 2013. It finds that ethylene prices rebounded due to tight supply and demand from Europe. Propylene prices rose on arbitrage and shortages in Southeast Asia. Butadiene prices surged due to new synthetic rubber plants in China driving demand, while tight supplies resulted from producers switching to lighter feedstocks. Derivatives like polyethylene, polypropylene and acrylonitrile faced challenges from weak demand. Overall, olefin prices increased but derivatives were negatively impacted.