Even up nearly 50% already today, Photronics stock still looks cheap enough to buy.Photronics (PLAB +43.13%) stock, which makes "photomasks" (devices for laying out circuit designs on semiconductor wafers) for the semiconductor industry, shocked investors with a big earnings beat this morning -- and the stock is up 46.5% as of 9:45 a.m. ET.Analysts forecast Photronics would earn only $0.44 per share on $204.5 million in Q4 2025, but the company actually earned $0.60 per share, with sales of $215.8 million. ...