Read the article about Caliber and Affinity in Modern Trader magazine.
Warning: The Caliber is rising so fast that we have to wonder what's going on.
S&P 500 Update For The Week Of November 13th 2017
The 60-day Caliber rose to 218 last week which means that over the last 60 trading days the S&P 500 behaved as if it was made up of 218 completely independent stocks and the overall diversity has increased. Higher Calibers sometimes coincided with better market conditions in the past but this might not be the case in the future. All stock trends are removed before the Caliber is calculated.
The correlation between a stock's return and it's Affinity fell to 0.133 last week. As shown on the graph below, high affinity stocks have had better returns than low affinity stocks this past year which is remarkable because all stock trends are removed before the Affinities are calculated.