SanDisk's pre-market gains in the US stock market have expanded to 6%.

SanDisk's pre-market stock price rose 6% to $1620 per share, following a nearly 14% increase in the previous trading day. Micron's stock gained 3% in pre-market trading. JPMorgan is optimistic about memory demand and has given SanDisk an "overweight" rating, with a target price of $2250.