(adds lira move in paragraph 3)

LONDON, Sept 26 (Reuters) - Ankara could tap international bond markets more than once before year-end, while a flurry of debt sales from Turkish firms will lift overall emerging markets high-yield issuance, said Stefan Weiler, head of CEEMEA debt capital markets at JPMorgan. Turkey's government and companies - usually regular and prolific issuers in hard-currency fixed income markets - had been largely absent in the run-up and the aftermath of the May election that saw President Tayyip Erdogan confirm his grip on power.

But recent efforts to shift the country to a more orthodox monetary policy after years of soaring inflation, a sliding lira and boom-and-bust cycles have seen a return of investor confidence. The lira weakened to a fresh record low on Tuesday, having lost more than 30% since the start of the year.

Turkey still has $2.5 billion earmarked in its budget for issuance this year - but could possibly go further than that, JPMorgan's Weiler told Reuters.

"Turkiye already addressed 75% of their international financing budget, so it is reasonable to expect another issuance to complete the budget and as in past years, Turkiye may also consider pre-financing future needs if market conditions are favourable," said Weiler, declining to comment on the timing of any potential debt sale.

Foreign investors, positioned cautiously to Turkish assets in the run-up to the election, missed out on the strong rally and have now started reducing their underweight positions.

"There is a clear normalising path of monetary policy and confidence is also being clawed back by the authorities through a number of market-friendly appointments this summer," Weiler said.

Erdogan appointed respected markets veteran Mehmet Simsek as finance minister while former Wall Street banker Hafize Gaye Erkan became the country's first female central bank governor.

"There is a general feeling that Turkiye’s credit story is turning around, but this view is not necessarily universal and municipal elections next year will provide another important checkpoint," Weiler said.

Markets are expecting Turkey to come to market within days, though some are pointing to a country ratings review by S&P Global Ratings scheduled for Friday. Fitch earlier in September upgraded Turkey's foreign currency outlook to "stable". The country's dollar-denominated bonds maturing in 2034 currently yield around 8.5%.

Meanwhile the surge in confidence was reviving corporate bond sales. Domestic appliance maker Arcelik last week became the first Turkish corporate to launch an international bond since January 2022.

"We recently increased our forecast for EM corporate issuance by $20 billion to (around) $275 billion for 2023 and a big component of the increase is the activity we have seen and are expecting from Turkiye," Weiler said.

September is generally a busy month for emerging market issuers, though adding to the momentum was increasing risk appetite from investors, he said.

However, that did not spread into all corners of the emerging high-yield markets, especially smaller and riskier sovereigns, so-called frontier markets - many of which are located in Africa.

"Most of Africa's sovereigns would likely need to accept double-digit yields, given current secondary market levels, and that's clearly not very appealing and would raise debt sustainability concerns," Weiler said.

"I do not expect sovereigns in Africa to issue until base rates start declining and if our (U.S. Treasury) predictions hold, we could see a few of them returning to the international capital markets next year." (Reporting by Karin Strohecker and Jorgelina do Rosario in London; Editing by Jacqueline Wong)