read-only memory.
non-volatile memory used in computers and other electronic devices; class of storage medium used in computers and other electronic devices

Clearwater Capital Reports Broad Q1 ETF Position Changes
In the first quarter, Clearwater Capital Advisors LLC actively adjusted holdings across multiple ETFs, buying several new positions and increasing exposure in others while trimming a stake in SPDR Portfolio Mortgage Backed Bond ETF. The firm added 4,031 shares of ProShares Ultra Technology, 16,513 shares of Direxion Daily Semiconductors Bull 3x Shares, and 11,204 shares of iShares U.S. Small Cap Equity Factor ETF (now totaling 479,209 shares), while raising First Trust Low Duration Opportunities ETF to about 909,130 shares and cutting SPMB by 29.2% to 236,435 shares.
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About read-only memory
Read-only memory (ROM) is a form of non-volatile memory used in computers and other electronic devices. Data stored in ROM cannot be electronically modified after the manufacture of the memory device. Read-only memory is useful for storing software that is rarely changed during the life of the system, also known as firmware. Software applications, such as video games, for programmable devices can be distributed as plug-in cartridges containing ROM.
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