Najib recalls how Pakatan Harapan had claimed in the past that if he steps down, the value of the ringgit will rise.
This follows reduced demand for the local note amid weaker oil prices, a dealer says.
PM believes that many currencies are hit by ongoing trade war between China and US.
Former premier hopes Putrajaya will take his concerns seriously before ringgit situation becomes dire.
COMMENT | We need to present a fresh face to the financial community heralding a New Malaysia.
Investors sentiment likely be influenced by trade war concerns and geopolitical uncertainty.
FXTM says the ringgit’s outlook hinges on global trade developments.
Meanwhile, short-term rates are expected to remain steady.
Emerging economies' currencies will remain under pressure from the US monetary policy meeting on Wednesday.
The value is 5 percent stronger than its current rate against the dollar, reports Bloomberg.
Experts say, however, that greater fiscal policy clarity can boost investor confidence.
COMMENT | The markets will settle because M’sia is no longer cooking the books.
Harapan's pledge to remove GST, restore fuel subsidy and increase minimum wage are among the factors.
GE14 | The ringgit one-month non-deliverable forward fell to 4.0461 against the dollar.
Governor Muhammad Ibrahim says the ringgit strengthened 14.6 percent in 2017.
Najib also rubbishes talk of bankruptcy, points to Malaysia's A- credit rating.
The value of the ringgit dropped by nearly 31 percent since GE13, notes DAP's Tony Pua.
YOURSAY | ‘The rakyat still remember the ringgit was once on par with the Singapore dollar.'
The ringgit is expected to gradually strengthen against the US dollar in the near term, add economists.
Rising ringgit may be checked by export prices, pre-GE14 jitters and US events, says Shankaran Nambiar.
The ringgit stands at 3.9010/9040 against the greenback from yesterday's close of 3.9110/9140.
'Investor confidence tends to rebound after the general elections,' says UOB's Lim Suet Ling
Second finance minister also attributes ringgit's performance to global oil price recovery.
The ringgit strengthens to highest level since Aug 2016, boosted by higher oil prices.
The ringgit opens higher against the underperforming US dollar this morning.
COMMENT | The strength of the ringgit is the most important indicator of our economic health.
Remember when the ringgit traded at RM3.58 to the dollar when Najib became PM, Tony Pua asks.