Tag: myth

Is there a correlation between USDINR and Tech stocks?

tl;dr

No.

The Myth

Regular viewers of CNBC might have heard the refrain that “IT stocks went up because the rupee went down.” But it turns out that it is the classic case of the journalist/reporter/anchor going in search of a reason to explain a random market event. If there is such a correlation, then a scatter plot of USDINR returns vs. CNX IT index returns should unearth it.

Scatter Plots of Returns

Weekly:
CNX IT.USDINR.scatter.weekly

Daily:
CNX IT.USDINR.scatter.daily

As you can see, there is no obvious link between USDINR and technology stocks. But what if the effect manifests after a lag?

Cross-Correlation Plots of Returns with Lag

Weekly:
CNX IT.USDINR.ccf.weekly

Daily:
CNX IT.USDINR.ccf.daily

Conclusion

Currency moves alone cannot be your go-to explanation for fluctuations in tech stocks.