Poet Technologies (POET +14.35%) experienced a significant surge in its stock price during Friday's trading session. The company's shares rose by 14.2%, while the S&P 500 gained 0.8% and the Nasdaq Composite increased by 1.7%. Notably, Poet's substantial gain occurred despite a lack of major news from the company. While the broader market's positive momentum partly explains the rally, the stock's trading has been highly volatile recently. Is Poet stock a buy right now? Poet stock has taken investors on a wild ride since CFO Thomas Mika confirmed in an April 21 interview that the company had an order in place from Celestial AI -- a company that was acquired by Marvell Technology in February. The stock saw massive gains on the move, but the rally was quickly wiped out after Poet published a business update announcing that Marvell had moved to cancel the order. Now, it appears the rally is back on -- and it's not exactly clear why. Poet stock has moved 51% higher over the last week on no apparent news. While it's possible that the stock could deliver massive returns if its photonics solutions find significant adoption in artificial intelligence (AI) applications, the outlook is highly uncertain right now. As a company that's still effectively pre-revenue, there is a lot of guess work involved in charting its trajectory. With the stock surging despite no clear catalysts this week, I think the rally looks too risky to chase for most investors right now.