1.   But a subsequent rebound in futures prices triggered arbitrage buying in the cash market, lifting the index back into positive territory, dealers said.

2.   Higher futures prices Thursday triggered arbitrage buying, pushing prices in the cash market higher, traders said.

3.   However, the yen failed to extend its gains and triggered buying on dips in the dollar by speculators and Japanese trading houses, dealers said.

4.   The rebound on Wall Street had an initial impact on the market, brokers said, but it was short-lived, failing to trigger follow-through buying after opening gains.