There are no sure things in the stock market, but Constellation Software Inc. CSU-T was as close as you get. “Was” being the operative word.

The stock has gone into freefall over the past five months or so, its losses now sitting at 33 per cent.

The selloff is all the more striking for the fact that the Canadian stock market is up by nearly 20 per cent over that time. Or that North American tech stocks have gained, on average, 30 per cent to 40 per cent.

Constellation is a crash unto itself, fuelled by the sudden suspicion that artificial intelligence is going to kill this company.

Is this really the end of one of the greatest – if not the greatest – runs in TSX history?

From the time of its initial public offering in 2006 up to its peak this year, the company’s shares gained roug

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