If you have truly mastered your emotions to the level you say I am in awe...
I hope I don't give that impression.
When my portfolios are down, it depresses me. No doubt. But if a stock's business and its prospects are unimpaired, I usually buy more.
I run two portfolios. One contains stocks trading below net current asset value. I call this the NCAV portfolio. I am not really concerned about the quality of the businesses that I buy for this portfolio. The selection process is almost purely quantitative. As long as the stock is growing net current asset value (or, if not growing it, it is not rapidly eroding it), the stock is a possible candidate. Also, the bigger the discount from NCAV, the better, in my view. Last year, for example, ONC (which now trades as TFL) traded for months around 20%
below net cash. It ended up distributing a lot of the cash to shareholders. The beauty of it was that even when ONC told the market that it was going to distribute this ton of cash to its shareholders the stock barely moved. I bought a chunk of it.
The NCAV portfolio did well towards the end of last financial year up to the beginning of this financial year. It ended up over 50%. The big winners were ONC, RIS and BAU. UOS which is not a NCAV stock but which is very cheap on an asset basis also made a decent contribution. The losers in that portfolio were TGZ, CHN, MGX and MPO. With an NCAV you always have losers. That is why you must diversify: it is the portfolio as a whole which gives you your outperformance. I have since sold down most of my positions in the NCAV portfolio after huge rises by ONC/TFL and RIS in particular. ONC/TFL almost tripled at one point in a matter of months but I was out of it by then. RIS is no longer trading below net current asset value and I am out of it as well.
My other portfolio contains stocks which I consider have a decent business but which are fairly to cheaply priced. This portfolio is quite concentrated and is currently down around 4% for the half year. The biggest loser has been IMF. It has had a setback with the bank fees case(although it's been granted leave to appeal that case to the High Court). Still, it has kept going down on sentiment alone, it seems. It dropped another 7% yesterday for no apparent reason. I am now down over 22% on it. But I will keep buying. The fundamental story has not changed. But its performance has left me scratching my head, to put it mildly.