Mid-cap stocks are presenting a golden opportunity for investors, offering a compelling combination of stability and high-growth potential. According to a recent note from analysts at Goldman Sachs, mid-cap stocks are now trading at valuations that are lower than their historical medians, creating a window of opportunity for investors. Unlike the volatile small-cap space, where 35% of companies in the Russell 2000 Index (RUT) are reporting losses, only 9% of mid-caps in the S&P Midcap 400 ($IDX) are unprofitable. Goldman Sachs strategist Jenny Ma highlighted that mid-cap earnings have grown fa…