The More Often You Check Your Portfolio, The More Volatile It Seems

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On the last Wednesday in July, I received several phone calls from clients. On the last Friday in July, nobody called. Why the difference? On Wednesday, the S&P 500 dropped 1.52%, and the Nasdaq composite dropped 1.74%. On Friday, the S&P 500 gained 0.7%, and the Nasdaq gained 1%.

Plenty happened between those two days. The Federal Reserve held rates steady and gave no guidance about what comes next. Major international companies reported earnings; one gained 15% while another lost 7%. Oil prices moved based on the war with Iran. All these events earned headlines. None of them changed where the month ended.

For the last week of July, the S&P 500 and the Dow each finished up about 1%. For the month, the S&P 500 finished down 0.1%, and the Dow finished up 0.3%. A volatile month ended almost exactly where it started.

The Impact of Checking Frequency

How volatile your portfolio feels depends mostly on how often you look at it. Daily prices jump around. Weekly prices jump less. Monthly prices are smoother than weekly, and annual prices are smoother than monthly. Checking more frequently does not change your investment. It does change your level of anxiety.

To understand this, think of the value of your house. Most people believe home values rise steadily along with inflation, and they believe it partly because nobody appraises a house every morning. If strangers knocked on your door each day with firm cash offers, you would watch your home value fluctuate the way your 401(k) does.