Are there futures markets on the Indices?? My view? If the bean counters don’t like the way the “free market” is determining the price, they simply nudge the market in the right direction. Just like Gold futures. Goldman Sachs and big margined contract buys or sells.
PS Re Richy’s post below, I forgot TPTB using the “news” to nudge price direction. Long ago I noticed that. The news interferes with T/A or changes the chart moves.