Taiwan's stock market opened Tuesday with a small gain, a mildly positive start for investors.

• The Taiwan Stock Exchange's main index opened up, near the 46,200 level.
• Early trading was light, with turnover around NT$10 billion in the opening minutes.
• The US dollar was weaker against the Taiwan dollar in Taipei trading.
• Heavy rain warnings for southern Taiwan added a local backdrop, though the tropical storm nearby is expected to have little impact.

Outlook: The modest open leaves direction unclear until fuller trading volume comes in.