You can practically overlay the '99 chart, MSFT didn't peak until December even though AMZN peaked in January. Market peaked in March 2000. We may be looking at a similar situation where the tax break earnings keep the market up until next year when they start having issues matching Y/Y comparable numbers.
Not enough movement to be the top yet, Greenspan raised rates like 6 times before the market finally tanked. We're still at the bottom as far as interest rates. Rates hit 6.5% in 1999, 20% under Jimmy Carter. We're not even 2% yet.