Sandisk's stock has experienced fluctuations, with reports of drops ranging from 5% to 14% on certain days, while also seeing significant gains, including a 558% increase this year. The memory sector, which includes companies like Micron, is being closely watched amid debates about whether the recent boom is driven by artificial intelligence advancements or is a speculative bubble. The stock's performance is being scrutinized by analysts and investors, with some days seeing declines and others seeing gains, such as a 7% jump ahead of its NASDAQ 100 inclusion.