Given human nature most of us are reluctant to admit when our opinions are wrong, and what does it take to cause you to admit it ?
Personally I can say I was wrong about Ford Motor Company, around 2007 or so, before the financial crisis, I believed Ford to the the worst of the US autocompanies, and the least likely to survive. In large part to Alan Mulally mortgaging every thing possible.
Secondly I can say I was wrong on the timinng of the US/world economic crisis. I truely thought it was going to hit at least 1 year earlier then it did, and the the size of it would be bigger.
One last thing I would say I would have been wrong one, even though I though I did think it was coming. The printing press of money in the US and UK. I truely never thought such actions could have occured without a far greater uproar in the public and bond markets. Such actions are that of banana republics, not respected countries and governments