'may lose value' is correct and usable in written English.
You can use it when speaking about something that can decrease in worth. For example, "Investors may want to pay close attention to the stock market, as their investments may lose value."
Your dollars may lose value, but at least they are real.
But because China has about $3 trillion in foreign exchange reserves, there are few places big enough to invest those holdings safely outside of United States Treasuries, even though it looks as if they may lose value.
Unfortunately such low-risk investments may lose value over time after inflation and are unlikely to generate much income.
The problem with this model is that if biotechnology innovation moves along a different path then large parts of Nadathur Investments portfolio may lose value.
Nokia predicts an overall growth in sales of 10% but is concerned it may lose value when compared to 2007 because of a weak U.S. dollar and economic slowdown in the United States and Europe.
In fact, the risks are clearly and repeatedly noted in bold print, not FDIC insured, may lose value, no bank guarantee.
Another dimension is warning investors that their fossil fuel assets may lose their value, if climate change is tackled.
They say their apartment houses have been converted into revolving-door hotels for young corporate raiders, and they fear that ultimately their property may lose its value.
But if the choice is between a lifelong general education or getting vocational training that may lose its value as the economy and technology change, which is the better option?
Furthermore, some work-related physical activities or tasks may lose their value because of e-administration.
Neither Sotheby's nor Mr. Hirst is interested in American collectors: their money may be losing value, but they may also know better.
