Nan Nan Resources Enterprise (HKG:1229) expects to post a loss of not more than HK$10 million for the six months ended Sept. 30, compared with a profit of about HK$47.1 million a year earlier, according to a Wednesday Hong Kong bourse filing.

The company said the projected fiscal first-half loss is driven by a fair value loss of about HK$31.7 million on its HK$200 million zero-coupon convertible bond issued in 2008 and maturing in 2026.

It added that a net exchange loss and lower gross profit, reflecting higher costs and reduced average selling prices in its coal mining business, also contributed to the downturn.