SwanBitcoin445X250

(Reuters) - A fatal crash and vehicle fire of a Tesla Inc (TSLA.O) Model X near Mountain View, California, last week has prompted a federal field investigation, the U.S. National Transportation Safety Board said on Tuesday, sparking a big selloff in Tesla stock.

FILE PHOTO - The logo of Tesla is seen in Taipei, Taiwan on August 11, 2017. REUTERS/Tyrone Siu/File Photo

Tesla tumbled 8.2 percent, or $25 a share, to close at $279.18, the lowest close in almost a year, after news of the investigation.

Late on Tuesday, Moody’s Investors Service downgraded Tesla’s credit rating to B3 from B2. Moody’s said the ratings “reflect the significant shortfall in the production rate of the company’s Model 3 electric vehicle.” It also “faces liquidity pressures due to its large negative free cash flow and the pending maturities of convertible bonds.”

Tesla shares fell another 2.6 percent in after-hours trading.

Tesla has $230 million in convertible bonds maturing in November 2018 and $920 million in March 2019.

Moody’s said its negative outlook for Tesla “reflects the likelihood that Tesla will have to undertake a large, near-term capital raise in order to refund maturing obligations and avoid a liquidity shortfall.”

Moody’s said Tesla is targeting weekly production of 2,500 Model 3 vehicles by the end of March, and 5,000 per week by the end of June, down from the company’s year-earlier production expectations of 5,000 per week by the end of 2017 and 10,000 by the end of 2018. Tesla plans to provide an update on Model 3 production next week.

Shares of chipmaker Nvidia Corp (NVDA.O), which supplies Uber Technologies Inc [UBER.UL], Tesla, Volkswagen AG (VOWG_p.DE) and other automakers, closed down 7.8 percent after it disclosed it suspended self-driving tests across the globe.

QUESTIONS ABOUT ACCIDENT

In last week’s accident, it was unclear if Tesla’s automated control system was driving the car. The accident involved two other cars, the NTSB and police said. Tesla vehicles have a system called Autopilot that handles some driving tasks. The 38-year-old Tesla driver died at a nearby hospital shortly after the crash.

“We have been deeply saddened by this accident, and we have offered our full cooperation to the authorities as we work to establish the facts of the incident,” Tesla said in a statement.

Government scrutiny of the Palo Alto, California company is mounting. This is the second NTSB field investigation into a Tesla crash since January.

The California Highway Patrol said the electric-powered Tesla Model X crashed into a freeway divider on Friday and then was hit by a Mazda before colliding with an Audi.

The Tesla’s lithium batteries caught fire, and emergency officials consulted company engineers before determining how to extinguish the battery fire and move the vehicle safely. NTSB said the issues being examined include the post-crash fire and removing the vehicle from the scene.

In January, the NTSB and U.S.

Read more from our friends at Reuters: