Tan remained a highly prominent member of the corporate sector, controlling numerous companies, including Sigma International, which had a 22.6% stake in Pan-Electric Industries (Pan-El), a Singaporean-based company. Pan-Electric entering receivership forced the closure of the Singapore and Kuala Lumpur stock exchanges between 2 to 4 December 1985, to try to contain the fallout on leveraged stockbroking firms. On 12 December 1985, Tan signed an agreement that gave the troubled company S$ 20 million of funds through an interest-free loan and allowed it to resume trading.