Trump Media stock drops more than 10% to open trading week

- Trump Media stock, DJT, closed down more than 8.4% on Monday - Market capitalization is just above $5 billion - Share price had a high of nearly $80 two weeks ago but has since slumped - Trump Media owns the Truth Social app used by former President Donald Trump - Trump personally owns 78.75 million shares of DJT stock - Trump stands to receive another 36 million shares if stock hits certain benchmarks over next 3 years - Trump is the presumptive Republican presidential nominee as of now