Tesla Serves As A Speculative Spigot

Jason Goepfert
2020-02-11

Speculative spigot

While it’s arguable to suggest that investors were showing speculative excesses in January, with many indications that they were, recently one of the few signs is trading activity in Tesla. Looking at other large jumps in compressed time frames among major equity index members, this is a worrying sign.

Stock jumps 50% in a week

Returns in the S&P 500 and Nasdaq 100 after any day in which a (current) member of the S&P 500 or Nasdaq 100 jumped more than 50% over only a week’s time were poor.

There was a cluster in 1999-00 (of course), but even outside of that, and even in recent years, such enthusiasm for an established stock has led to mostly poor shorter-term returns for the indexes themselves.


Growth vs. Value

Growth has been all the rage throughout this bull market, and continues to be so. Tech continues its nonstop rally, and stocks like Tesla are popping.

Turning Growth vs. Value into a ratio, it's clear that growth has surged over the past few months, pushing the ratio's 14 week RSI into overbought territory (i.e. >70).

Growth versus value relative strength index

Does this automatically mean that growth will underperform relative to value in the near future? Not necessarily. Here's what happened to the ratio between them after it reached an extreme:

Growth versus value overbought

In some cases, extreme momentum isn't a very useful contrarian sign. Instead, it's a sign that "strength begets more strength". In this case, strong momentum in Growth vs. Value usually led to Growth outperforming over the next 2 months.

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