Dave is trading 4.15% up in pre-market at $334.01, but the reason for the gain remains unclear. - Shares closed at $320.70 on September 28. - Dave’s investor-relations releases show no announcement dated September 28 or 29; its latest listed release is its August 5 second-quarter results. - Broader indexes are mixed in the supplied market context, which does not establish a broad-market catalyst for the rise.