Hi,I was trying to figure the value of the warrants Berkshire Hathaway received as part of its recent $5B equity infusion in Goldman Sachs. My question is regarding the volatility estimate. How do I get the implied volatility for the 5 year period - Sept 2008 to Sept 2013?I used the following information and the OVX function of Bloomberg to calculate the warrant value. 1. # of warrants 43.5 million 2. Strike - $1153. Current price - $127.984. Exercise type American5. Period 5 years6. Volatility 45% (based on the observed volatility of last 400 days).With these parameter, the function is giving me a value of $56.48 per warrant, i.e., approximately $2.45 billion for all the warrants.Thanks,MG.