In the poll, 16 of 18 economists predicted the Bank of Thailand's Monetary Policy Committee (MPC) would hold its one-day repurchase rate at 0.50% for a second straight meeting.

The other two economists saw a 25 basis-point cut to a fresh record low of 0.25%, citing economic shrinkage, falling consumer prices and a stubbornly strong baht.

Most analysts think policymakers may want to save some ammunition while assessing risks and the effects of earlier support measures.

"There are fixes needed with previous measures that have been rolled out, such as the drawdown in soft loans," said Kobsidthi Silpachai, head of capital market research at Kasikornbank. "It is the distribution of low rates that need to be addressed".

Economic activity has picked up in recent weeks as a result of the government's largely successful containment of COVID-19 so far, meaning there are "no pressing reasons for the BOT to use up its remaining ammunition," HSBC said in a note.

The BOT has forecast Southeast Asia's second-largest economy will shrink by a record 8.1% this year but recently said there had been some improvement after the lockdown was eased.

Economist Takit Chardcherdsak at Asia Plus Securities said the MPC might ease policy in the fourth quarter because of "unknown factors".

Some analysts said the BOT is unlikely to take action before new governor Sethaput Suthiwart-Narueput, an MPC member and economic advisor to the prime minister, takes office in October.

However, economist Tim Leelahaphan at Standard Chartered Bank forecast a quarter-point cut this week "amid a persistent economic contraction, negative inflation, a strong Thai baht and rising household debt".

By Orathai Sriring