Sandisk (SNDK) rose 14.2% before the open to $1,589.4. According to Odaily, the stock fell to $1,325.03 on July 17, with a maximum drawdown of 43.7% from its high; the latest price is up 20.0% from the low but still down 32.5% from the high.

Hyperinsight monitoring showed that a whale previously tracked for trading U.S. stocks had built a new position during the rebound, buying 22,910.2 shares through 5,380 trades between 1:29 p.m. and 4:50 p.m. at an average price of $1,548.2. Including existing orders, the trader planned to build a $90 million position. As of the report, SNDK contracts were at $1,554.8, and the whale held the long position with 6x isolated leverage, a position value of about $35.6116 million, a liquidation price of $1,357.4, and an unrealized profit of about $141,800.

The article said the timing may reflect a bet on the continuation of the storage sector rebound and expectations ahead of earnings on August 5. Recent catalysts also included sampling of 10th-generation 3D NAND (BiCS10) and an investor day on August 13.

The whale's current Sandisk and Micron orders included 22 Sandisk buy orders in the $1,520 to $1,546.4 range for a total of 35,312.2 shares, 2 Sandisk sell orders in the $1,668.4 to $1,671.5 range for 362.1 shares, and 45 Micron sell orders in the $996 to $1,018.7 range for 9,374.218 shares. The address was described as a high-frequency swing trader that has rotated among Sandisk, Micron, Western Digital, the DRAM index, Intel, and SPCX, with realized gains concentrated in Intel, Micron, and Western Digital and cumulative profit of more than $16.2 million over the past two months.