This is the 1449th most frequent Russian word.
инвестиционных
The Russian word "инвестиционных" means "investment" (adjective, relating to investments).
Here, "инвестиционных" is an adjective modifying "проектов" (projects), indicating that these projects are related to investments.
Фонд занимается анализом инвестиционных проектов.
The fund focuses on analyzing investment projects.
In this sentence, "инвестиционных" modifies "возможностей" (opportunities), suggesting that these opportunities pertain to or arise within the realm of investment.
Развитие инвестиционных возможностей важно для экономики страны.
The development of investment opportunities is important for the country's economy.
"Инвестиционных" describes "планов" (plans), connecting these plans to the concept of investment.