As markets fell, investment firm websites suffered outages

The websites and mobile apps of discount brokers, mutual fund companies and digital advisers suffered outages and slowdowns on Monday, frustrating individual investors trying to access their accounts during the market rout.

The trade disruptions came as US stocks plunged towards the end of the trading day. The Dow Jones Industrial Average DJIA,
-0.45%
closed more than 1,170 points on Monday, its biggest one-day point drop on record, and the S&P 500 SPX,
-0.72%
and Nasdaq Composite COMP,
-0.90%
were both around 4%.

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Investors have complained online about outages at Betterment LLC, a pioneer in the world of automated investing; Digital Advisor Wealthfront Inc.; Charles Schwab Corp. SCHW,
-0.98%
; TD Ameritrade Holding Corp. AMTD,
-5.32%
; vanguard group; and elsewhere.

A company, T. Rowe Price Group Inc. TROW,
-1.74%
, suffered an outage late in the day before restoring service. “We sincerely regret the inconvenience caused by the recent outage and want you to know that the website is now live,” said a tweet from the company’s Twitter account around 4 p.m. Many Vanguard Group customers were unable to log into their accounts on Monday afternoon. Several posted on Twitter and on bogleheads.org, a popular online investing forum named after company founder John C. Bogle, that they couldn’t see their account balances or trade Monday after- midday.

An expanded version of this report appears on WSJ.com.

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