This is the 13923rd most frequent Turkish word.
marketlerin
"Of the markets" or "markets'" (possessive form of "markets" in Turkish).
In this case, 'marketlerin' again shows possession but refers specifically to the pricing policies of the markets.
Yeni düzenlemeyle marketlerin fiyat politikası değişebilir.
With the new regulation, the pricing policy of the markets may change.
In this sentence, 'marketlerin' is the possessive form (plural, third-person) showing ownership of the opening hours.
Marketlerin açılış saatleri sabah 8'de başlar.
The opening hours of the markets start at 8 in the morning.
Here, 'marketlerin' indicates the location associated with the markets.