my biggest mistake was Blackberry.
my first buy was last year when the stock was around 6$ almost at the low. i saw the Company not dead yet and allot of good assets, prem in it and so on. i bought a Little stake, make good Money on it. my first mistake was that i take the trading mentality. normally i have the value Approach, great bargains, longer term Holding period. but this time it was the wrong side. the fact that you earn a lot of Money in short time was the devil. i sold it after very short time with around 40% gain. then i didnt follow it closer and the rise in Blackberry stock goes on, i was angry that i sold to early. after studying it closely i decided to go back and invest in it again, i think this was in the end of December 2012 last year when the Shares Drops after bad earnings. i bought a lot of Shares, especially because of the release of the new smartphones in end of Januar i was very optimistic. and i saw still a lot of value in it. the stock rises very much thereafter in Januar and i sold short before the Launch date for a 40% gain in one month. this was all great, big gains in very short time. but then the Errors beginn. i bought a Little stake back before the Launch (too much greed) then as everybody knows the Launch was terrible, i was in the red, bought more and more Shares. the rollercoster begin stock up and up and stock down and down. i put more and more Money into it,. i was so blind of to much greed. read the prem watsa comments especially the fair value of 40$ in a few years and so on, thousands of articles why Blackberry is so good and so on, have the Feeling that this Thing will double in a year. but then after the downtrend begin with bad Marketing ( i hated how they doing Marketing) the bad earnings, the false promises from Thorsten heins (that he will sell tens of millíons of q10) i realize that it was a big mistake ever to invest in such a Company. with this competitors Samsung and apple and lot of other Players. Blackberry was a good Company, great assets, great Chat, great patents, great engineers. but they do all steps wrong. all steps! i trusted also too much on the words of prem watsa and chou for example. that the patents alone would be worth 13$. i was to greedy and then i sold my stake around 8,5$ with a 40% loss.
the end of this mistake is, i made Money altough i have a 40% loss. i made 40% two times (80% gain combined) and then i lost 40%. so i have still 40% more Money. but it was terrible. i make an Investment what i never would do again. in such a specific Branche and terrible Situation. my lesson is that i never buy such a Company again, and only buy things that i can hold longer term and sleep well at night. too much greed is very dangerous.