(Bloomberg) -- The current volatility taking hold of gas prices, especially in Europe, is a “signal that the market is much tighter than many expect,” according to the head of Australia’s biggest natural gas exporter.Most Read from BloombergNew York City’s ‘Living Breakwaters’ Brace for Stormier SeasIn Italy’s Motor City, Car-Free Options Are GrowingIn Kansas City, a First-Ever Stadium Designed for Women’s Sports Takes the FieldNYC's Underground Steam System May Be Key to a Greener FutureNYC Get