Analyst Jim Shanahan suggests Berkshire's results need to be...

Analyst Jim Shanahan suggests Berkshire's results need to be stronger to maintain momentum. Concerns about wildfire liability related to Berkshire's PacifiCorp utility unit could depress earnings. The stock buyback pace and record cash pile indicate CEO Warren Buffett doesn't see the stock as cheap or find much opportunity for cash deployment. The stock is trading at a premium to its five-year average and the S&P 500.