I was dabbling with this last evening, and it occurred to me that there's one potential difficulty we face when attempting to investigate China-based RTO's. It's often really tough to identify them. The list I have that I mentioned yesterday came from a Bloomberg story back in early 2011. It was never exhaustive to begin with, because it didn't include AMEX issues, and absolutely ignored OTC issues, which are probably far more numerous. (ADR's are a relatively simple matter; BNY Mellon has a comprehensive list.)
It's very possible that the group of China-based RTO's that are involved in litigation actually form a very small subset of the entire universe of these issuers. Just no sure at this point how we work that out.
Here is what I am doing. I have a list of 93 of the approximate 230. The first thing I am doing is going through each one to see if they are filing and making any corresponding notes to that. I check some back ground on the company then go on PACER to see if they are listed under a class action suit. Again, making notes on the status that I can quickly garner from PACER.
Once the 93 are completed. I will use yahoo finance to dance around and find other Chinese RTO's that can be seen on the summery page. (people viewing xxx are also viewing yyyy)
I don't have any other idea how to complete the list but by doing that.
Ideas... PS. This work could benefit both long and short sellers when it is done. Who knows.