Today’s upgrades for Validea’s Book/Market Investor model based on Joseph Piotroski include TRANSPORTADORA DE GAS DEL SUR SA (ADR) (TGS), a small-cap value stock in the Oil & Gas Operations industry. The stock’s rating changed from 0% to 90% based on strong underlying fundamentals and valuation. The company operates a gas pipeline system in Latin America, connecting main gas fields with distributors. The stock meets most of Piotroski’s criteria, indicating potential interest or strong interest. Piotroski, an accounting professor, developed a successful stock-selection method that outperformed the S&P 500. Validea offers investment research based on strategies of investment legends like Warren Buffett and Benjamin Graham.

Read more at Nasdaq: Validea Joseph Piotroski Strategy Daily Upgrade Report – 9/9/2025