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Former Tesla short seller warns his TSLAQ peers: ‘I wouldn’t do that’
Tesla stock (NASDAQ:TSLA) may have seemingly leveled out in recent days, but a longtime critic of CEO Elon Musk still thinks that it’s too risky to bet against the electric car maker. In recent comments, noted Tesla bear Carson Block admitted that he is no longer shorting TSLA, simply because it is far too dangerous to go against Musk and his EV company.
Block, the founder of Muddy Waters Capital LLC, is a noted critic of Elon Musk. However, in an interview with Bloomberg’s Tracy Alloway and Joe Weisenthal on the Odd Lots podcast on Wednesday, the short seller stated that he no longer has any bearish wagers against Tesla.
“I’m not short the stock, thank God. We used to joke that Tesla, when it files for bankruptcy, will probably have a $30 billion market cap. Short it at your own risk. I wouldn’t do that,” Block said, though he noted that he still believes that Tesla’s business is unsustainable.
Tesla has experienced a rise of over 300% since mid March. Amidst this massive bull run, and as the company exceeded expectations by delivering over 90,000 vehicles in the second quarter, TSLA stock has gained more supporters, especially among retail investors. As of Wednesday, Tesla stock was trading at 182 times its 12 month earnings, versus 10 times for rival American automaker General Motors.
During his segment, Block stated that at one point, he had a TSLA position that involved buying the electric car maker’s convertible bonds and using the coupon payments to fund long dated puts on the stock. Eventually, the short seller admitted that he sold the debt and let the puts expire. Block then issued a warning to fellow Tesla bears, stating that it’s very risky to bet against Elon Musk.
“It’s one thing to bet on Elon Musk, but it’s another thing to bet against him. The guy specializes in pulling rabbits out of the hat,” he said.
While Block was cautious enough to warn short sellers who would like to bet against Tesla, references to Elon Musk “pulling rabbits out of the hat” suggest that the Muddy Waters Capital founder still maintains a rather limited view of the company’s operations and expansion. It is easy to note that Tesla vehicle registrations fell in California during Q2, for example, but one should not neglect the effects of the pandemic, or the company’s numbers compared to other automakers, for that matter.
Tesla is also expanding its vehicle production and deliveries outside the United States, and this was no more evident than in Q2’s results. During the quarter, the company’s deliveries in the US were adversely affected by the pandemic, but sales of the Model 3 picked up in China, propelled by a ramp in Gigafactory Shanghai. And if Gigafactory Berlin goes live with Model Y production next year as planned, Tesla’s sales will be bolstered even more. Very few Tesla critics also acknowledge the potential of Tesla Energy, which is finally starting to ramp its operations.
Disclosure: I have no ownership in shares of TSLA and have no plans to initiate any positions within 72 hours.
News
Tesla is improving Giga Berlin’s free “Giga Train” service for employees
With this initiative, Tesla aims to boost the number of Gigafactory Berlin employees commuting by rail while keeping the shuttle free for all riders.
Tesla will expand its factory shuttle service in Germany beginning January 4, adding direct rail trips from Berlin Ostbahnhof to Giga Berlin-Brandenburg in Grünheide.
With this initiative, Tesla aims to boost the number of Gigafactory Berlin employees commuting by rail while keeping the shuttle free for all riders.
New shuttle route
As noted in a report from rbb24, the updated service, which will start January 4, will run between the Berlin Ostbahnhof East Station and the Erkner Station at the Gigafactory Berlin complex. Tesla stated that the timetable mirrors shift changes for the facility’s employees, and similar to before, the service will be completely free. The train will offer six direct trips per day as well.
“The service includes six daily trips, which also cover our shift times. The trains will run between Berlin Ostbahnhof (with a stop at Ostkreuz) and Erkner station to the Gigafactory,” Tesla Germany stated.
Even with construction continuing at Fangschleuse and Köpenick stations, the company said the route has been optimized to maintain a predictable 35-minute travel time. The update follows earlier phases of Tesla’s “Giga Train” program, which initially connected Erkner to the factory grounds before expanding to Berlin-Lichtenberg.
Tesla pushes for majority rail commuting
Tesla began production at Grünheide in March 2022, and the factory’s workforce has since grown to around 11,500 employees, with an estimated 60% commuting from Berlin. The facility produces the Model Y, Tesla’s best-selling vehicle, for both Germany and other territories.
The company has repeatedly emphasized its goal of having more than half its staff use public transportation rather than cars, positioning the shuttle as a key part of that initiative. In keeping with the factory’s sustainability focus, Tesla continues to allow even non-employees to ride the shuttle free of charge, making it a broader mobility option for the area.
News
Tesla Model 3 and Model Y dominate China’s real-world efficiency tests
The Tesla Model 3 posted 20.8 kWh/100 km while the Model Y followed closely at 21.8 kWh/100 km.
Tesla’s Model 3 and Model Y once again led the field in a new real-world energy-consumption test conducted by China’s Autohome, outperforming numerous rival electric vehicles in controlled conditions.
The results, which placed both Teslas in the top two spots, prompted Xiaomi CEO Lei Jun to acknowledge Tesla’s efficiency advantage while noting that his company’s vehicles will continue refining its own models to close the gap.
Tesla secures top efficiency results
Autohome’s evaluation placed all vehicles under identical conditions, such as a full 375-kg load, cabin temperature fixed at 24°C on automatic climate control, and a steady cruising speed of 120 km/h. In this environment, the Tesla Model 3 posted 20.8 kWh/100 km while the Model Y followed closely at 21.8 kWh/100 km, as noted in a Sina News report.
These figures positioned Tesla’s vehicles firmly at the top of the ranking and highlighted their continued leadership in long-range efficiency. The test also highlighted how drivetrain optimization, software management, and aerodynamic profiles remain key differentiators in high-speed, cold-weather scenarios where many electric cars struggle to maintain low consumption.

Xiaomi’s Lei Jun pledges to continue learning from Tesla
Following the results, Xiaomi CEO Lei Jun noted that the Xiaomi SU7 actually performed well overall but naturally consumed more energy due to its larger C-segment footprint and higher specification. He reiterated that factors such as size and weight contributed to the difference in real-world consumption compared to Tesla. Still, the executive noted that Xiaomi will continue to learn from the veteran EV maker.
“The Xiaomi SU7’s energy consumption performance is also very good; you can take a closer look. The fact that its test results are weaker than Tesla’s is partly due to objective reasons: the Xiaomi SU7 is a C-segment car, larger and with higher specifications, making it heavier and naturally increasing energy consumption. Of course, we will continue to learn from Tesla and further optimize its energy consumption performance!” Lei Jun wrote in a post on Weibo.
Lei Jun has repeatedly described Tesla as the global benchmark for EV efficiency, previously stating that Xiaomi may require three to five years to match its leadership. He has also been very supportive of FSD, even testing the system in the United States.
Elon Musk
Elon Musk reveals what will make Optimus’ ridiculous production targets feasible
Musk recent post suggests that Tesla has a plan to attain Optimus’ production goals.
Elon Musk subtly teased Tesla’s strategy to achieve Optimus’ insane production volume targets. The CEO has shared his predictions about Optimus’ volume, and they are so ambitious that one would mistake them for science fiction.
Musk’s recent post on X, however, suggests that Tesla has a plan to attain Optimus’ production goals.
The highest volume product
Elon Musk has been pretty clear about the idea of Optimus being Tesla’s highest-volume product. During the Tesla 2025 Annual Shareholder Meeting, Musk stated that the humanoid robot will see “the fastest production ramp of any product of any large complex manufactured product ever,” starting with a one-million-per-year line at the Fremont Factory.
Following this, Musk stated that Giga Texas will receive a 10 million-per-year unit Optimus line. But even at this level, the Optimus ramp is just beginning, as the production of the humanoid robot will only accelerate from there. At some point, the CEO stated that a Mars location could even have a 100 million-unit-per-year production line, resulting in up to a billion Optimus robots being produced per year.
Self-replication is key
During the weekend, Musk posted a short message that hinted at Tesla’s Optimus strategy. “Optimus will be the Von Neumann probe,” the CEO wrote in his post. This short comment suggests that Tesla will not be relying on traditional production systems to make Optimus. The company probably won’t even hire humans to produce the humanoid robot at one point. Instead, Optimus robots could simply produce other Optimus robots, allowing them to self-replicate.
The Von Neumann is a hypothetical self-replicating spacecraft proposed by the mathematician and physicist John von Neumann in the 1940s–1950s. The hypothetical machine in the concept would be able to travel to a new star system or location, land, mine, and extract raw materials from planets, asteroids, and moons as needed, use those materials to manufacture copies of itself, and launch the new copies toward other star systems.
If Optimus could pull off this ambitious target, the humanoid robot would indeed be the highest volume product ever created. It could, as Musk predicted, really change the world.
