According to the DRAMeXchange research division of TrendForce, 4Q19 NAND flash bit shipment increased by nearly 10% QoQ thanks to demand growth from data center clients. On the supply side, contract prices made a successful rebound due to shortages caused by the power outage at Kioxia's Yokkaichi production base in June. In sum, 4Q19 NAND flash revenue reached $12.5 billion, an 8.5% increase QoQ.

The stronger-than-expected 4Q19 performance from the demand side helped improve supplier inventory back to normal levels. In response, NAND suppliers were able to reduce their allocations to the wafer market and instead focus on shipping products with comparatively higher margins.