TD Ameritrade took swift action to curb the chaos in the markets by imposing limits on certain trades involving GameStop and AMC Entertainment. This move comes as a response to the unprecedented stock market frenzy fueled by amateur investors on Reddit's "wallstreetbets" forum. The video-game retailer, GameStop, saw its share price soar nearly 157 percent to an intraday high of $380, while AMC Entertainment surged as much as 310 percent to $20.35.

In a bid to mitigate risk for their clients and the company, TD Ameritrade implemented "several restrictions" on select transactions involving GameStop, AMC, and other securities on their trading platform. A spokesperson for TD Ameritrade explained that this decision was made out of an abundance of caution due to the unprecedented market conditions and other factors at play.

The move came as the company's parent, Charles Schwab, experienced slowdowns on its trading platforms due to the massive market activity. Both companies managed to resolve the issues by midday, but not before thousands of users reported problems to the outage-tracking website Downdetector. The glitch only affected clients trying to use the platform on mobile devices.

TD Ameritrade and Schwab clients weren't alone in their struggles, as investors faced issues with at least four other online trading platforms. Robinhood, a popular app targeted at retail investors, reported a "service disruption" to its web app while its cryptocurrency trading platform suffered a major outage. The issues were resolved by about 12:20 p.m., according to Robinhood's status dashboard.

Other online trading platforms like Fidelity and E-Trade experienced difficulties within an hour of the opening bell, as Downdetector reports showed. Vanguard Group also reported that some clients were "experiencing difficulty accessing their accounts" on its website. However, by about noon, the issues appeared to have waned.

The chaos in the markets was characterized by massive trading volumes. More than 62 million GameStop shares had changed hands by 12:30 p.m., a significant increase from roughly 2 million shares traded on the same day last year. AMC's volume surpassed 797 million shares, far exceeding popular blue-chip tech stocks like Apple and Tesla.

As mobile app development continues to shape the financial landscape, it's clear that TD Ameritrade's actions were necessary to ensure a smoother trading experience for their clients. By imposing limits on certain trades, they demonstrated a commitment to mitigating risk in an unpredictable market.