Sentiment and Sensex: A surprisingly divergent trend

Consumer sentiment down nearly 11% cumulatively in the first fortnight of 2017

The BSE-CMIE-UMich Consumer Sentiment Index declined by 3.9 per cent during the week ended January 15. This was on top of a 7.3 per cent fall that the sentiment suffered in the preceding week. The cumulative fall in consumer sentiment during the first fortnight of 2017 was thus nearly 11 per cent. This is a substantial fall for a 15-day period. In fact, it is the steepest fall for any fortnight since the index was launched last January.
 
Sentiment seems to be falling down at a steeper gradient than its initial ascent since demonetisation.
 
What is striking about