Equity markets have performed well in 2024, but their showing pales next to that of Viking Therapeutics (VKTX -7.45%), a mid-cap biotech that rose in prominence this year. The drugmaker's shares are up by nearly 200% since January.However, while many investors are excited about Viking's prospects, others worry they have already missed the boat. How much upside does a clinical-stage biotech with a market cap of $6.3 billion have? Is it too late to invest in Viking Therapeutics, or do the company's shares rem ...