Elon Musk's Tesla has soared in recent years, but has tumbled around 30% in 2022.Justin Sullivan/Getty Images Short-sellers have made $8.2 billion betting against Tesla this year as tech stocks tumbled, according to new data. Investors racked up $62.5 billion betting against Nasdaq 100 companies in general, Ortex research found. It's a turnaround for short-sellers, who were burned by the surge in Tesla among others in 2020 and 2021. Short-sellers have made around $8.2 billion betting against Elon Musk's Tesla in 2022 so far, after years of bruising losses when the electric-vehicle maker's stock confounded expectations.They've also reaped rewards from this year's market sell-off more generally, making $62.5 billion in realized and unrealized gains on stocks in the tech-heavy Nasdaq 100 index.