In response to a request for further details on the release date of Tesla Inc (NASDAQ:TSLA) first Model 3 sedan, CEO Elon Musk tweeted that the company will unveil news on Sunday. Tesla is also expected to announce its second-quarter deliveries shortly after the quarter ends.

Ahead of the upcoming catalysts, Goldman Sachs analyst David Tamberrino reiterates a Sell rating on Tesla Motors shares, with a price target of $190, which represents a potential downside of nearly 50% from where the stock is currently trading.

Tamberrino wrote, “We believe the company should comfortably achieve its 1H17 delivery guidance (47k to 50k). Our 2Q17 forecast of 23.5k would put TSLA at 48.5k for 1H17, although we note potential upside does exist. That said, we believe the vehicle delivery amount is likely a non-event as the calendar change to July places all attention on first production of the Model 3.”

“On that front, we continue to expect a slower cadence than implied by the company and for 2H17 margins and EBITDA to underperform relative to Street expectations While shares have run significantly higher (up 47% vs. the S&P up 2%) since our 02/27 downgrade on positive news flow (incremental product announcements, investment by Tencent, potential China expansion), we still see downside to TSLA’s share price as we progress into the Model 3 launch,” the analyst added. (Watch Tamberrino’s track record here.)

Out of the 19 analysts polled by TipRanks (in the past 3 months), 6 rate Tesla stock a Buy, 7 rate the stock a Hold and 6 recommend a Sell. With a downside potential of 21%, the stock’s consensus target price stands at $285.27.