There are 2-3 major index providers. While most of the time they are run by specific rules and guidelines, we can't rule out the impact of politics in their decision making.
Institutional money follows these benchmarks when investing in a country. Not all institutions but large number of them.
So in the
#BIST100 case, it will be important not to ignore warning signs of the Global index providers. Only the anticipation of downgrade can result in major shifts in capital and a deserted investment environment until the conditions change. Important to take care of this without reaching to that level.