With Southeast Asia's largest defense budget, the wealthy city-state is a key prize for global arms companies as it looks to invest in new technology and upgrade its equipment.
Corbyn said May had sent Britain hurtling toward the cliff edge of a disorderly exit on March 29 with no transition period, and urged her to ditch "red lines".
The North Korean visit could yield an announcement of plans for another summit between Trump and Kim Jong Un, the source said, speaking on condition of anonymity.
Investors may have been hoping for more after Netflix announced a price hike for U.S. subscribers earlier this week, usually a sign that demand is strong.
Japanese authorities have charged Ghosn with under-reporting income and aggravated breach of trust for temporarily transferring personal investment losses to Nissan in 2008.
Washington granted waivers to eight major buyers of Iranian oil - including China, India, Japan and South Korea - after restoring energy sanctions in November.