Yes i use leverage. My portfolio is not concentrate in 1 stock, i have 13 stocks in the portfolio i managed. Those porfolios have equity in mid 7 figures. I managed portfolio for family, friend and for me.
I started in summer of 2001 and since that my CARG in margin account is 24.6% and in the RRSP (no margin involved) 24,8% or 24,7% for both. I use a lot more leverage a few years ago but now my objective is to have 1$ of equity for 1 $ of debt. Now i am less leverage than that.
It's sure that 86% is not repeatable. And i don't expect to repeat 24,7% for long term. It would be great if i repeat it but i know the probability are very low, near impossible. Now i'am 40 years old and i will retired in march.
I am not overconfident. I got a near destruction of my margin account in the last historical crisis. It's why my leveraged return are less that the RRSP (no leverage).
Some of my best investment since 2001 was ATD.b.to (my biggerst position and a 17 baggers now) PRAA, MEQ.to, FFH.to, MTY.to, BAC, AIG, Marvel, DIS, GBT.a.to... And GEAC, the fist one that i bought in 2001, i made 5x my money on this one. It was very good for my confidence to start with GEAC. At this time i start with 5000$ that i take on my credit card.
My cimetary of bad stock is well garnish to with some name like FTP.to, FMD, Krispy Cream, RIM, Mega Brand post Fairfax, and others i dont remember.