This Warren Buffett Stock Was Just Downgraded by a Wall Street Analyst. Here's What Investors Should Know Before Selling.

Berkshire Hathaway stock was just downgraded by equity research analyst Meyer Shields.Warren Buffett is one of the most recognized and celebrated personalities in modern finance. During the past 60 years, he has helped build Berkshire Hathaway (BRK.A +1.14%) (BRK.B +1.30%) into a investment conglomerate spanning various industries -- consumer goods, financial services, infrastructure, energy, and much more.Despite a long-term track record of success, one analyst on Wall Street sees trouble ahead for Berkshi ...