(Reuters) - Top Wall Street brokerages Goldman Sachs and Morgan Stanley downgraded their ratings on Tesla Inc <TSLA.O> saying the electric carmaker's shares were overpriced, two days after the high-flying stock crossed $1,000 per share.

The brokerages, while reiterating that their long-term view on the stock remains positive, noted the current valuation underestimates risks including increased competition in the electric vehicle industry.

Top automakers including General Motors Co <GM.N> and Ford Motor Co <F.N> have doubled down on their investments in the space by offering more electric vehicles, aiming to cash in on a sector that is touted as the most promising alternative to conventional cars.

"We highlight risks to Sino-U.S. trade, near-term demand, capital needs and tech competition as the key bear vectors we think deserve more attention," Morgan Stanley analyst Adam Jonas said in a note on Friday.

Morgan Stanley cut its rating to "under-weight", joining 12 other brokerages who recommend selling the stock.

Following Goldman Sachs' downgrade to "neutral", Tesla now has 12 analysts with a "hold" rating, and nine brokerages recommending "buy" or higher.

The bar for the automaker's fundamentals is higher, Goldman analyst Mark Delaney said on Thursday, while increasing the price target to $950 from $925.

Morgan Stanley cut its price target on Tesla's stock to $650 from $680, in line with the median price target, according to Refinitiv data.

Tesla's shares, which have jumped a whopping 360% in the last twelve months, were down nearly 1% in premarket trading.

(Reporting by Tanvi Mehta and Munsif Vengattil in Bengaluru; Editing by Shounak Dasgupta)