ISTANBUL, Sept 21 Reuters Turkey39;s central bank raised its key interest rate by a lofty 500 basis points to 30 on Thursday, marking a second month of aggressive tightening after President Tayyip Erdogan set aside his long opposition to tight policy.

The bank reiterated it is ready to raise rates further as needed to rein in inflation that leapt to nearly 59 in August and is expected to rise into next year. It has hiked rates by 2,150 basis points since June.

The lira slipped to 27.105 to the dollar after the decision, just shy of its alltime low touched last month.

In a Reuters poll, economists forecast a 500basispoint hike with forecasts ranging from 27.5 to 31.

The fourth rate hike in as many months is probably not enough in itself to convince investors that inflation is being brought under control, said James Wilson, EM sovereign strategist at ING.

We expect further rate hikes will be needed before the end of the year, although the overall direction of policy towards a more hawkish bias should in general be taken as a positive by investors.

Following his May reelection, Erdogan appointed former Wall Street banker Hafize Gaye Erkan to lead the central bank in June as authorities grappled with an economy strained by depleted FX reserves and soaring inflation expectations.

Previously Erdogan had supported a low interest rate policy despite high inflation, which triggered a currency crisis in late 2021 and pushed inflation above 85 last year. Partly due to lira…