A Tesla Inc. (NASDAQ:TSLA) bull on Wednesday took stock of his investment thesis for the electric vehicle giant’s stock as it remains stuck in a lackluster trading range. What Happened: “I’ve been wrong on $TSLA for three years now,” said Future Fund’s Gary Black, adding that the stock has been his “worst-performing long” during the period when Tesla fell 19% compared to a 32% gain for the Nasdaq 100 Index. Future Fund has Tesla as the third-highest holding of its Future Fund Active ETF (NYSE:FFND). Black conceded that he was wrong about volume trajectory. Tesla’s volume growth has slowed desp…