Singapore Post is trading 3.39% down at SGD 0.28 amid a sharp sell-off in Singapore equities. - The Straits Times Index fell 3.5% on October 8 as rising bond yields and oil-fuelled inflation concerns weighed on sentiment. - No clear company-specific negative catalyst surfaced. Singapore Post announced a public trial of digital stamps on October 8, but available coverage does not link the announcement to the share-price decline.