Using caution with bubble type internet stocks, stocks with no profits, real estate with large price jumps is suggested by experts. Models and methods have been developed to detect bubble type activity. Sornette at the Financial Crisis Laboratory, Swiss Federal Institute of Technology and the Bank of Finland's Taipalus have developed models to detect bubbles, including the bubble activity in internet IPO's and stocks in 2014. Chancellor at Boston asset manager GMO and Utkus at the Vanguard Center of Retirement Research have also come up with methods to detect bubble activity. Utkus says investors could reduce allocation by 10-20% in the case of stocks with bubble activity. Investors were doing this by reallocating in April 2014 from biotech and internet stocks to safer large cap stocks, because internet and biotech stocks had seen sharp increases of over 25% in a short period.