BIST 100 closes down 5.54% at 13,122.58 as circuit breaker halts trading; Tera Portföy defaults on two funds

Borsa İstanbul's BIST 100 closed 16 September 2026 down 5.54% at 13,122.58 points, its lowest in about 5.5 months, with roughly ₺1.3 trillion wiped off the market and the circuit breaker halting trading. The slump is tied to a fund-industry liquidity crisis: Tera Portföy has defaulted on payments in two funds and changed exit terms in six others, after Pusula Portföy failed to meet ₺55 billion in redemptions.

Detected & updated continuously · Source: Nebula