The details of the position are listed here:
SEC FORM 13-F Information Table
I'm not well-versed in bonds, and I'm probably butchering the terminology here, but from what I understand Soros has acquired convertible notes maturing March 2021 and a par value of $2.5 Million. It looks like the notes are currently trading at around 86% par. The notes are convertible to the tune of 2.78 shares per $1000 principal.
So if I understand all this correctly, buying these notes right now is like buying shares for $309 (deliverable in 2021) plus a guarantee of getting all your money back if Tesla stays solvent through 2021, plus a yield of about 1.4% as of writing. That seems like a pretty good deal to me. Am I missing anything?