Option (B). The P&D derisked the Q3 downside fear that had been present through much of the quarter. It capped the potential upside, but IMHO the downside risk has been weighing a lot more on institutionals as of late. ER unlikely to be a profit but also constrained to not be a terrible loss, no demand problem, orders exceeding deliveries, and looking very good going into Q4.
Also, I'd add an option (D): technical traders. The stock has been in an upwards channel for a while, so when the stock dips down to the bottom of the channel, it encourages them to grab it up, expecting more upside. I personally think technical trading is hokum, but technical traders do exist, so...
One more thing to mention is that of people who want to be invested in the automotive space, most of the competition is looking increasingly terrible right now.
Hopefully modest q3 financials results have been priced in following the P&D #s. The q3 report will also bring guidance for q4. Maybe there is growing optimism for q4 profits that is helping the share price. I know Elon said he was fairly confident that q4 would be profitable. I wonder what our modellers here are thinking about the chance for and degree of q4 profits.