This is the 10200th most frequent Russian word.
биржевой
"Биржевой" means "exchange-related" or "pertaining to a stock exchange."
The word "биржевой" is used here as an adjective describing "аналитик" (analyst), specifying that the analyst specializes in the stock market.
Биржевой аналитик сообщил о возможных изменениях на рынке.
The stock market analyst reported possible changes in the market.
"Биржевой" modifies "индексный фонд" (index fund), indicating that the fund is related to the stock exchange.
Она купила биржевой индексный фонд для инвестирования.
She bought a stock index fund for investment.
In this sentence, "биржевые" describes "торговцы" (traders), identifying them as individuals who trade on the stock market.