The few US equities in my retirement fund don’t track the S&P500 or Nasdaq. They track an index by Solactive in Frankfurt and are weighted by float (the value of shares available for public trading) not market capitalization (the value of all shares, including the ones owned by the company). They also require that a stock be at least ten days after IPO to be included. I think they will be a more resistant to bending the rules than an American index although I would not put it past German banks to buy tranches of bad debt from the Amerikaner.