The share price of Gujarat State Petronet Ltd (GSPL) has plunged sharply today after a number of brokerages downgraded the stock. The downgrades come after the Petroleum and Natural Gas Regulatory Board (PNGRB) cut tariffs for the company’s high-pressure (HP) network by 47 percent. The tariff cut is expected to have a significant impact on GSPL’s financial performance, and the downgrades reflect the brokerages’ concerns about the company’s future prospects.