buying support; support buying
Refers to the act of purchasing to prop up prices or demand, often used in stock markets or commodity markets.
The government decided to support rice prices through buying.
As stock prices fell, institutional investors stepped in to support the market.
Compound of 買い (kai, 'buying') + 支え (sasae, 'support'). The reading かいささえ is a straightforward combination of the two elements.