The Globe and Mail reports in its Friday edition that when shares of Arm Holdings, the British chip designer, began trading Thursday on Nasdaq in the year's biggest initial public offering, investors, tech executives, bankers and start-up founders were watching closely for how it performed. A New York Times item inside The Globe says that if Arm's stock fell, they knew the market for IPOs was likely to stay frozen for longer, but a warm welcome for the shares would probably mean many more companies going public in the coming months, ending a cold streak. They quickly got their answer. Arm's shares opened trading at $56.10, up 10 per cent from its initial offering price of $51 (all figures U.S.). Shares quickly soared further, rising 25 per cent by the end of trading to close at $63.59 and giving the company a fully diluted valuation of $67.9-billion. That is positive news for listings from the grocery delivery start-up Instacart and the advertising tech company Klaviyo, which are expected to go public next week. Founded in 1990, the company sells blueprints of a part of a chip known as a processor core. Its customers include many of the world's largest tech companies, such as Apple, Google, Samsung and Nvidia.