Horizon Robotics (HORIZONROBOT-W, 09660) saw its stock price soar by 9.42% during Tuesday's trading session, outperforming the broader market. This significant surge came on the heels of a crucial announcement from the Shenzhen Stock Exchange (SZSE).

The SZSE revealed that Horizon Robotics has been added to the list of Southbound Stock Connect securities, in accordance with the provisions of the "Shenzhen-Hong Kong Stock Connect Business Implementation Measures". This inclusion is a major catalyst for the stock's impressive rally, as it opens up the company to a wider pool of mainland Chinese investors.

The Southbound Stock Connect is a cross-border investment channel that allows mainland investors to trade eligible Hong Kong-listed stocks. Inclusion in this list typically leads to increased liquidity and investor interest, which can positively impact a stock's performance. For Horizon Robotics, a company known for its work in artificial intelligence and robotics, this development could potentially lead to enhanced visibility and investment opportunities in the mainland Chinese market.