1. You'll see that this projection takes TSLA's mkt cap to $ 5.7 trillion in 2028 or so. That would be for a company growing revenue at 25-30% per year and with a net margin of about 15%, not shabby. In comparison AAPL is about $2.5tn now, often grows at 20-25%, but has an average long term growth of only (!) 13.5% and a net margin of about 20%. Essentially I think I am being pessimist re how the market will view TSLA, but I would rather err on that side.
2. Total world stock market cap is about $85 tn, and total world GDP is about the same (i.e. there is a contradiction in these numbers) (
Global market capitalisation exceeds world GDP, evoking 'bubble' concern) so I'll use $100t as an easy number to play with. Then let's say total mkt cap doubles over the next ten years (i.e. a 7% growth rate) to $200tn. That means that in 2030 if TSLA had a $6t mkt cap it would represent 3% of the global economic value.
3. However energy sector is about 3% of global GDP (
Energy industry's share of GDP by select country 2015 | Statista) which I suspect is an underestimate, but it does mean TSLA would be about 100% of the energy sector mkt cap if one was simplistic. Fortunately automotive is another 3% (
Read @Kearney: The contribution of the automobile industry to technology and value creation.) but even so that would put TSLA as being 50% of both. Personally I think more delving will find that the two sectors properly analysed represent about 15%, in which case TSLA would be about 20% of the mkt cap of the sector at that time. Which would make sense as 20m vehicles per year would be about 20/85 of global vehicle production using now figures, more likely 20/100 by 2030 due to demographics. I'd like to see someone do that mkt cap exercise properly, personally I get lost in the World Bank and OECD stats engines because I am unfamiliar with setting up a query properly (
Table 2: GDP by sector (in percentage)).
4. You will note that I left interest as a $0 number, i.e. I assumed all the cashflows would go to fund expansion or pay dividends. I've previously analysed capex requirements for expansion of this scale and concluded that TSLA can now self-fund, so there comes a time when dividends are required to clear the money out, after amassing a suitable sized warchest of course. Elon's plans for Mars and space will likely require very considerable amounts of cash input for planetary-scale pump-priming, so I think I can see a willingness to consider dividends at the very top.
But indeed, wow.