SINGAPORE - A "trade with caution" has been issued on Singapore Exchange (SGX) and China Fibretech on Thursday morning following unexplained trading activity in the two counters on Wednesday.

Both SGX and China Fibretech had said on Wednesday that they were not aware of any reasons that could possibly explain the trading in their shares that day.

SGX shares climbed as much as 5.62 per cent, closing the session up 4.5 per cent at $8.18. China Fibretech shares tumbled 30.12 per cent before closing down 26.7 per cent at $1.18

At around 10:20am on Thursday, SGX was trading down 4.9 per cent at $8.14, while China Fibretech was up 14.4 per cent at $1.35 .