I love my old Thinkpad, but its old nvidia is not enough for blender. How's the performance of your setup? Could you share the exact model & gpu you are using?
PSA: Outside of stat arb and heavily leveraged market making with teams of PhDs, 60% annualized CAGR doesn't exist. In the real world, anything above 10% over the long-term (in-sample over 50 years), is extremely likely to be spurious and won't repeat.
None of the retail brokers (including ibkr) do this correctly, although ibkr is probably the best for retail. Their cross-margining for futures options doesn't work (since the options are treated as "securities" and the futures are treated as "commodities", they treat them as segregated accounts).
They do handle multi-legged options trading, and implement SPAN correctly within the futures space. Portfolio Margining is not always correct (they don't implement customer portfolio margin baskets right), and be aware that margin can *and does* change drastically, particularly during financial crisis.
Not necessarily true; if you got a mark on copper futures in Europe then you would expect the best American copper futures bid/ask to change fast. Updating bid/ask doesn't require trading.
https://www.lenovo.com/us/en/p/laptops/thinkpad/thinkpadp/le...