Spot rubber ended firm on Tuesday. RSS 4 improved further to ₹134.50 (₹133.00) and ₹134.00 (₹133.00) per kg respectively. The trend continued to remain mixed as ISNR20 closed unchanged on low demand. The May futures declined to ₹134.00 (₹136.23) per kg on the Indian Commodity Exchange (ICEX). RSS 3 (spot) weakened to ₹122.51 (₹123.27) per kg at Bangkok. The May futures improved to ₹126.91 (₹125.85) per kg on the Tokyo Commodity Exchange (TOCOM).