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1. An improvement to an existing product. Some companies, especially technology companies, offer upgrades to customers for free or at a discount.

2. An improvement to the quality of securities in a portfolio. For example, one may sell a stock with a given risk and return and buy another stock with a higher return at the same level of risk. Alternatively, a security may upgrade by itself; for example, its issuer may announce higher than expected earnings, and, therefore, a higher dividend.

3. An increase in a bond rating. For example, if a bond goes from a junk rating to an investment-grade rating, the bond is said to be upgraded. This usually occurs when the issuer reduces its exposure to one or more risks.


to replace an existing COMPUTER system (HARDWARE and/or SOFTWARE) by a more powerful model capable of processing data faster or storing larger amounts of data. When upgrading, computer users can experience problems of compatibility with existing programs and machines.
References in periodicals archive ?
This is unlike other upgradable systems which require the addition of more expensive CPU boards or awkward cache adapter boards.
The system is revolutionary in that it is easily upgradable to a dual-head system to efficiently accommodate higher patient volumes with faster throughput.
Its upgradable switching fabric and line optics allows the FLASH2400 ADX to scale in system capacity and capabilities to meet changing network requirements.
Before the advent of RTOS-level support for programmable logic design, users could only approach the design of network upgradable applications from the chip level.
Nuron has decided to use Virtex FPGAs for their high performance, upgradable systems.