A series of nested structures are presented with A, B, and C appearing at different levels. The structures show relationships between items over time as B increases within A and C remains constant over multiple levels. The document also references having invested and sold items in the past, with increases since January and over the last few years.

10. A

11. A
B

12. A
B
C

13. A
B
C
B

14. A
B
C
B
A

15. A
B
C
B
A
A

16. A
B
C
B
A
A
A

17. A
B
C
B
A
A
A
B

19. sold

20. sold
have invested

21. sold
have invested
stands

22. sold
have invested
stands
have increased

23. sold
have invested
stands
have increased
retired

25. Back in the eighties

26. Back in the eighties
At the moment

27. Back in the eighties
At the moment
since January

28. Back in the eighties
At the moment
since January
Last month

29. Back in the eighties
At the moment
since January
Last month
Over the last few years

30. Back in the eighties
At the moment
since January
Last month
Over the last few years