The VIX, which is a measure of options pricing and is often referred to as a “fear index” saw a 15% drop on Friday. Meanwhile, the VXO, which is the old measure of the VIX, declined nearly 22%. Such big declines often suggest short-term over-optimism on the part of traders and are followed by a dip the next day. This can be seen in the study below.

Numbers here suggest a downside edge. Traders may want to keep this in mind today.

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