undersubscribed
adjective
uk/ˌʌndəsəbˈskraɪbd/ us STOCK MARKET
if a share issue is undersubscribed, not enough people want to buy the available shares:
The Bank's issue of gilts was undersubscribed.
used to describe a situation in which not enough people want to buy or have things, such as tickets or places:
Some courses are undersubscribed.
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oversubscribed