Well likely to withdraw VW's ordinary shares, but then promote VW's preference shares to Dax-30 index. Am still trying to figure out full application but looks like it would happen before trading begins on Thursday, if rules are applied correctly and based on past 30 days volatility. Am tempted to trade it as any normal index change event....
However there has been 7 other studies on the same subject, mostly by mutual funds. Used to be a great trade especially on Hang Seng indices,FTSE 100 & 250 , Johannesburg Top 40, but it has been recently(2006 onwards) crowded by hedge funds. In bearish or jittery conditions play half position size and consult the chart.