As Elon Musk Promises The Future, Tesla Stock Slides Into The Past

Any investors hoping that Tesla stock might have turned over a new leaf by brushing off last week's losses were sorely disappointed on Monday. Not only did shares fall about 2%, they also reached the ignominious milestone of canceling out a year's worth of gains. Tesla (TSLA) stock is now down about 5.5% over the last 12 months, according to…