Thank you for this. It's frustrating to hear people making comments who don't have the fundamental understanding of why/how the markets work and are just upset about not being able to join in on the melee and assume it's nefarious behavior. My POV is that it was obviously a risk RH took to not make it more clear what the behavior of people's accounts would be when market volatility is high. But I worked for a Commodity Risk Management Company on their custom derivatives platform and 90% of what we did was around properly valuing customer positions so we could make sure margin requirements were met. This was a huge deal to everyone involved because the counterparty risk was so high for our company.