noun
private equity; unlisted shares
Financial term referring to shares of a company that are not publicly traded on a stock exchange.
未公開株式への投資はリスクが高いが、リターンも大きい可能性がある。
Investing in private equity is high-risk, but the potential returns are also large.
Compound of 未公開 (unpublished, unlisted) + 株式 (stock, share). The exact historical derivation is uncertain; the term is a straightforward modern financial compound.