<p>Hanif Mamdani, head of alternative investments at Royal Bank of Canada&rsquo;s RBC Global Asset Management and responsible for about C$6 billion ($4.6 billion) in assets, said he&rsquo;s prepared to sit on cash and wait for opportunities -- possibly in REITs and utilities -- that may arise if the U.S. 10-year Treasury yield climbs toward 3 or 3.5 percent from 2.45 percent on Tuesday.</p>