JERUSALEM, Feb 14 (Reuters) - A muted response by financial markets to the credit rating downgrade of Israel by Moody's last week shows investors understand the Israel's economy is only temporarily struggling due to the war with Hamas, said Prime Minister Benjamin Netanyahu's chief economic adviser.

Since Moody's on Friday cut Israel's sovereign credit rating to A1 from A2, Israel's first ever downgrade that the agency cited largely the military conflict that raises the country's political risk, markets have moved little.

The shekel currency now stands at 3.66 per dollar versus 3.68 before the ratings action, in which Moody's kept its outlook at negative to imply a further cut. The main Tel Aviv 125 index is up 1% this week, while government bond prices are largely flat.

"The fact that the markets did not react to Moody's announcement - maybe it's a lack of confidence. It shows the markets do not pay much attention to what Moody's says," Avi Simhon, director of the National Economic Council in the Prime Minister's Office, said in an interview with Reuters.

Israeli officials have reacted angrily to the Moody's downgrade, which Finance Minister Bezalel Smotrich dismissed as a "

manifesto

" that was not based on sound economic reasoning.

Simhon, like other government officials, believes the ratings reduction was not warranted since the deterioration of public finances is due to the war with Palestinian Islamist group Hamas in Gaza and they believe the economy will recover quickly once the war is over.

As a result of the war that the central bank estimates will cost Israel some 255 billion shekels ($70 billion) through 2025, the budget deficit is expected to jump to 6.6% of gross domestic product in 2024, with the debt to GDP ratio projected to reach 67% this year.

Such levels, Simhon said, are far lower than in many top European countries and are below those in the pandemic when the rating was not lowered.

"The deteriorating public finances are not something fundamental. It's a temporary thing," Simhon said. "We have a war and we have to finance it. It costs a lot but we can manage it without even probably going above 70% (debt to GDP ratio)."

He noted that the debt burden should start to decline in 2025 or 2026 and move back to around 60%, where it was in 2022, a few years later given rapid economic growth.

Simhon said that as long as the war stays contained to Gaza and did not expand to Hezbollah in Lebanon the budget deficit in 2024 will be lower than 6.6%. "With a major war in the north, it could be higher but it's not going to be like the times of corona (when it was close to 12%)," he said.

($1 = 3.6586 shekels) (Reporting by Steven Scheer; Editing by Toby Chopra)