Backpack, the Solana-based crypto exchange and neobrokerage, now lets users post real shares of Micron Technology (MU) and SanDisk (SNDK) as collateral in a unified portfolio-margin account spanning stocks, crypto and other instruments. Equity holdings that previously supported only buying and selling can now back U.S. dollar borrowing, futures trades and spot margin without moving funds between accounts. Alongside the collateral change, Backpack introduced 24/7 perpetual futures on MU, SNDK, SPY and QQQ. The newly announced collateral scope is limited to the two named equities and four perpetual markets; the firm said more would follow but gave no timetable. Backpack had already offered international investors round-the-clock trading in selected real U.S. equities, including Micron and SanDisk, after launching 24/7 trading for real U.S. shares on July 10, 2026. An earlier equities rollout stated that investors hold full ownership of traded U.S. shares and can bridge traditional securities and tokenized representations on Solana on a one-to-one basis. Tokenized Micron and SanDisk shares launched in June and July 2026 remain 1:1 backed by real stock, while the real shares now supply margin weight in the cross-asset account. The setup places Backpack between traditional prime-brokerage-style cross-margining and crypto-native derivatives venues that typically do not hold real equities in the same account.