Berkshire Soars Near $1 Trillion as Buffett Urges Caution Amid Market Volatility
• US stock futures muted ahead of key inflation data that could test recent market rally
• Berkshire Hathaway nears $1 trillion valuation after posting record annual profit again
• Buffett says Berkshire "built to last"; praises long-time business partner Charlie Munger
• S&P 500 has advanced 15 out of last 17 weeks, putting it on pace for a near record-setting run
• In annual letter, Buffett urges investing caution amid "casino-like" market behavior and risk of permanent capital loss