NEW York palladium prices streaked to a fresh high over $800 an ounce in a record one-day gain on Tuesday, the rally snowballing as speculators increasingly displace stockpiled automakers as the main source of demand, analysts said. Panic over shortages has arisen because top-producer, Russia, has not shipped enough metal to supply to the West’s booming automotive industry, which uses palladium, along with platinum and rhodium, in catalytic converters to remove exhaust pollutants.