the five Ws
Your primer to an issue in the news
Hong Kong's share market breaks through the 31,500 mark.
Monday - and analysts expect it to continue rising.
A rate cut is expected later this week - this pushed up property stocks and led to Monday's increase.
What's more, the Hang Seng Index (HSI) has been rising steadily since Beijing's announcement in August of the 'stocks through-train', which allows mainlanders to invest directly in Hong Kong-listed shares.
Who is investing in the HSI? There are a lot of new investors from the mainland. They are also investing in the mainland market, betting that it will continue climbing, underpinned by the mainland's buoyant economy.
How safe is the market? It is risky. Shang Fulin, chairman of the China Securities Regulatory Commission, said new entrants to the mainland stock market did not understand the risks involved and needed to be educated.
Where else are markets rising? European markets are higher - on Monday the FTSE, DAX and CAC were all up. And in the US, the Dow Jones industrial average was also up.