speculation

noun
B2+
1
B2+
the act of forming opinions about what has happened or what might happen without knowing all the facts
گمانه‌زنی, حدس و گمان
2
C1+
the activity of buying and selling goods or shares in a company in the hope of making a profit, but with the risk of losing money
سفته‌بازی, سرمایه‌گذاری ریسک‌آمیز
speculation in oil
speculation against the euro
speculation on the stock market