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S&P downgrades debt-laden Mexican state oil firm Pemex

FILE PHOTO: Tanker trucks of Mexico state oil firm Pemex's are seen at Cadereyta refinery in Cadereyta, on the outskirts of Monterrey, Mexico January 23, 2019. REUTERS/Daniel Becerril/File Photo

MEXICO CITY (Reuters) - Ratings agency Standard & Poor's on Monday slashed the stand-alone credit profile of Mexico's national oil company Pemex, piling more pressure on the government to tighten up the debt-laden state-owned oil firm's finances.

S&P cut its stand-alone assessment of Petroleos Mexicanos, as Pemex is formally known, to 'B-' from 'BB-', reflecting growing concern that support pledged by the government to shore up the firm and its slowing production will not be enough.

The agency also cut Pemex's outlook to negative from stable, just as it did for the Mexican government late on Friday.

The agency kept Pemex's global investment grade rating at 'BBB+', in line with the government.

The peso currency was slightly weaker on Monday after the S&P moves, which followed a string of warnings about Pemex's financial health. At 2:32 p.m. EST (1932 GMT), the peso was trading down by 0.41 percent against the dollar.

The bleaker outlook reflects concern that the government's plan to clean up Pemex's finances is insufficient, S&P said, adding that the company is exposed to political decisions that could conflict with its financial objectives.

"The government's financial support, in order to restore credit fundamentals, falls well short of the company's multi-annual capital investment needs," S&P said in a statement.

S&P later also lowered the outlook to "negative" from "stable" for Mexican telecoms giant America Movil, Coke bottler Coca-Cola Femsa, and upscale retailer Liverpool, keeping their ratings unchanged.

The lowered outlook reflects the exposure that these companies face from the government's financial vulnerabilities, describing firms in telecommunications and beverages as "moderately sensitive" to country risk.

The agency added that it would consider a one-notch downgrade for both America Movil and Coca-Cola Femsa if it were to downgrade the Mexican government.

Mexican President Andres Manuel Lopez Obrador has pledged to revive Pemex, which had financial debt of nearly $106 billion at the end of 2018, and is struggling with declining production.

Crude output slipped to 1.62 million barrels per day in January, the lowest since public records began in 1990.

Last month, Lopez Obrador said his government would inject $3.9 billion into Pemex to strengthen its finances and prevent a further credit downgrade, shortly after rating agency Fitch cut its rating to just one level above junk status.

S&P said on Monday that Pemex could require at least $20 billion over multiple years to avoid "further deterioration."

Mexico's finance ministry said it would not offer any reaction on Monday to the S&P move. Pemex declined to comment.

S&P said the three-notch drop in PEMEX's stand-alone credit profile was in part due to the fact that the company's core businesses are underperforming its previous expectations.

"Also, the continued loss in operating efficiencies has the national refining system running at less than 40 percent of installed capacity," S&P said.

(Reporting by Daina Beth Solomon, Dave Graham and David Alire Garcia; Editing by Grant McCool and Sandra Maler)