The Competition Authority has launched an investigation into television audience measurements — the system that decides which programmes stay on air and which channels receive advertising budgets worth billions of liras.

Following its review of the advertising sector, the Authority decided to open an ex officio investigation into FIFTY5BLUE, the company that provides TV audience measurement services.

Ekranların kaderini belirleyen reyting ölçümleri mercek altında!
Televizyonda hangi programın yayında kalacağından, milyarlarca liralık reklam bütçesinin hangi kanala gideceğine kadar tüm dengeyi belirleyen reyting ölçümleri hakkında soruşturma başlatıldı. https://t.co/FtccOFhdYa

— Rekabet Kurumu (@RekabetKurumu) November 13, 2026

Rating results show more than just how many people watch a channel or a programme. They also reveal which audience groups are being reached.

Advertisers and media planning agencies use these figures to calculate the cost of reaching their target audience and to decide where to spend their budgets. TV channels, in turn, set their advertising prices based on the same data and compete for a share of the advertising market.

This is why the reliability and comparability of audience data are essential for fair competition across the entire sector.

The Competition Authority will examine how these measurements work in practice and how they affect competition in television advertising. In particular, it will look at how FIFTY5BLUE uses the underlying data, how it builds and manages the households in its audience panel, how viewing records are processed, how results are reported, and whether any of these practices breach competition rules.