This is the 1762nd most frequent Korean word.
주식을
"주식을" means "stocks" or "shares" (in finance) in English.
주식을 here refers to stocks, which are financial instruments traded in markets.
나는 요즘 주식을 공부하고 있어요.
I am currently studying stocks.
주식을 in this context refers to purchasing shares or stocks.
그는 주식을 사려고 은행에 갔어요.
He went to the bank to buy stock.
주식을 here describes the act of investing in stocks within financial markets.