A true Market Wizard hangs up his trading jacket. https://www.chicagobusiness.com/finance-banking/another-big-chicago-trading-name-exits
At age 76, it's really time to call it a day, however successful a person has been throughout his life. It's an age when one has to be thankful for waking up in the morning.
I agree. But if someone manages other people's money, he should be mindful of his age and the risk that age will wear off his performance and cause him to lose other people's money.
When I get to that age, I hope that everything I do will be automated. Maybe my computer will be trading for me long after I'm dead. In any case, not all people age at the same rate. Maybe cognitively he's at the same level as most 45 year olds.
The code behind the automation still needs to be changed from time to time because market changes. You still need to be mentally agile even with full automation.
A good system requires very little tweaking. Doesn't require nearly the attention and focus that discretionary trading requires -- once it's developed.
I would be scared to death (no pun intended) if I was dying and realized my main purpose in life and what gave my life meaning was my job and work. What a poor testimony to the wisdom of such person.
Roughly speaking, how much are the appro costs for data/exchanges/connectivity for a firm of that size?