The Federal Reserve should prepare investors for a rate hike, in order to avoid a markets meltdown. ‘If the Fed raises rates at every meeting after September, or whenever they start, I think the market could have a little trouble digesting that,’ said Scott Wren, senior global equity strategist at Wells Fargo (WFC) Investment Institute. ‘Especially if the Fed doesn’t prep the market well ahead.’ Wren said if the Fed plans a rate hike during its June meeting, that would likely cause plenty of downside volatility, as the markets are not prepped for such an announcement. While some analysts say a June rate hike is in play, the minutes of the Fed’s April meeting said many Fed officials thought a June liftoff was ‘unlikely.’ ‘I’m a firm believer that three or four months in advance, the Fed will virtually tell us, maybe in Fed speak, when they are going to make that first rate hike and what the pace is going to be after that,’ Wren added. TheStreet's Scott Gamm reports from New York.