Paper wealth gen.

[Энигма]

Как бы смысл понятен, но точная формулировка сходу в голову не приходит, да и далека я от финансов. что-нить вроде "стоимость на бумаге"?
Мой контекст:
Meanwhile, Facebook’s Mark Zuckerberg lost a bigger chunk of paper wealth than anyone on the Forbes 400 list. The enormous drop in stock value since the social networking giant’s bumbled IPO in May cost the young CEO $8.1 billion dollars in net worth. (тут, может, упущенной выгодой назвать можно?)

Объяснение из Вики:
Paper wealth means wealth as measured by monetary value, as reflected in the price of assets – how much money one's assets could be sold for. Paper wealth is contrasted with real wealth, which refers to one's actual physical assets.

For example, if one owns a house and its assessed value increases (relative to the general price level, i.e., assuming no inflation) then one's paper wealth has increased – the asset has increased in value, meaning it could in principle be sold in exchange for a larger quantity of money, but one's real wealth is unchanged – the real asset is still the same house. It is said that one has "gotten richer on paper," meaning "as an accounting matter": numbers on a balance sheet have changed, but the physical world has not.

The term "paper wealth" is frequently used in popular discussions of wealth, and in some critiques of capitalism, finance, and certain economic theories, but is little-used in mainstream economics, which instead generally identifies wealth with paper wealth. The term "paper wealth" has some pejorative connotations, suggesting "only on paper (but not in reality)", but can also be used neutrally to mean "(simply) as an accounting matter". Related distinctions are sometimes drawn between real assets and financial assets, or between tangible assets and intangible assets, the latter particularly in accounting, as detailed below.

[Rengo]

бумажная стоимость

[NC1]

Бумажное богатство.

Смысл в том, что львиная доля личных активов товарища Z -- это акции сами-знаете-чего, а они скачут в цене и могут вообще обесцениться, если сами-знаете-что обанкротится (туда ему и дорога).

Насчет "упущенной выгоды" даже и не думайте -- это opportunity cost. У Вас же речь идет о том, что цены на акции упали и стоимость пакета, принадлежащего товарищу Z, от этого уменьшилась на нетривиальную сумму.

[Энигма]

бумажная стоимость плохо гуглится что-то

[rendezvoir]

номинальная стоимость