I am breaking all the diversification rules right now by keeping almost 90% of my money in AIG. I used to hold ARR or AGNC, but I have switched to AIG in Sept 2012.
Portfolio contents at 12/31/2013
AIG (92%) BAC(4%) BRK.B(2%), AGNC (2%) ARR(1.5%)
Estimize is a crowdsourced financial estimates platform offering a true view of market expectations on 1,500+ stocks. Its earnings estimates are more accurate than Wall Street 70% of the time and are crowdsourced from 10,000 regular contributors.
Renaissance Capital provides pre-IPO research and global IPO market analytics to institutional investors. The firm manages portfolios of unseasoned equities through the Renaissance IPO ETF (IPO) and the Renaissance International IPO ETF (IPOS).
Interested in trading systems since 1996... in early to mid 2016, I completely stopped trading individual stocks barring a few small trades in long term accounts. After much research & backtesting, I now trade a SPY option spread system. Good luck!