The Financial Post reports in its Friday edition that SpaceX shares slipped Thursday for a second straight day as it wraps up its first week as a public company following a record initial public offering. A Bloomberg dispatch to the Post says the stock fell as much as 5.8 per cent shortly after the open of U.S. exchanges, extending Wednesday's nearly 5-per-cent decline, which marked the first down day for shares after they jumped 49 per cent across the first three days of trading. Still, the rocket and artificial-intelligence company remains on track to end the week about 35 per cent above its $135 (U.S.) IPO price. Volatility is likely to continue as investors weigh lofty expectations for future revenue growth without a clear path to achieving them, according to Michael Monaghan at Founder Funds in Dallas, which holds shares of SpaceX. "We got very comfortable owning this stock because we could see $200-billion of revenue in 2030," he said, noting even higher estimates elsewhere. "But literally and figuratively you need a rocket to go get those revenues." Arete Research's Andrew Beale initiated coverage Thursday with a buy rating and $401 (U.S.) price target. Share lockups could put upward pressure on SpaceX shares.