01549nam a2200133Ia 4500008004100000100002300041245008200064260006500146300001000211520114300221650001401364650001801378700001901396220216s9999    xx            000 0 und d  aEdirisinghe Jagath 0aSeasonal bahaviour of natural rubber prices in different markets in the world  bBulletin of the Rubber Research Institute of Sri Lankac2004  a45-50  aPrices play a key role in the profitability of an enterprise. This study attempted to investigate the seasonality in prices of rubber in different markets in the world. The market prices of New York, London, Singapore, Kuala Lumpur and Sri Lanka (Colombo) were studied. The seasonal indices were calculated using the decomposition technique in time series analysis and data from 1980 to 2002 were used. Study of the seasonal indices reveals that htere are considerable differenced in seasonality of prices in different markets. The markets in the major consuming areas selected (New York & Londo n) ahd differences in peaks and troughs achieved in a typical year. While Kuala Lumpur and Si ngapore prices are above average in the first half of the year, the Colombo price was above average in the middle and latter part of the year. The in-depth analysis of Colombo market shows that crepe grades of rubber have higher variability than the Ribbed Smoked Sheets (RSS). It was concluded that the timing of supply (storage) and use of technologies (rain guards) to curtail interference by rain is prodent, as it will increase yearly profits.  aNR Prices  aRubber market  aHerath Keminda