Gail stock crash: The Petroleum and Natural Gas Regulatory Board (PNGRB) approved a lower-than-expected tariff of Rs 65.69/mmbtu, versus street expectation of Rs 70/mmbtu.Gail stock crash: The Petroleum and Natural Gas Regulatory Board (PNGRB) approved a lower-than-expected tariff of Rs 65.69/mmbtu, versus street expectation of Rs 70/mmbtu. Latest News [ SOBAN NEWS: International and National ]