Asian shares skidded on Thursday as a reality check set in about longtime economic damage from the coronavirus pandemic, giving Wall Street its worst day since October. (AP Photo/Ahn Young-joon)Robinhood is warning its brokerage app users about “market volatility” while small-pocket investors continued their battle with the big players on Wall Street by pouring money into companies like GameStop and AMC. Easy-access trading apps like it are at the center of the war between groups of small investors communicating on social media and Wall Street short sellers. Here are some specific articles from Robinhood Learn to help make sense of market volatility: -- The stock market has been super volatile – How can I make sense of it? Amid significant market volatility, it’s important as ever that we help customers stay informed.

Robinhood and TD Ameritrade were among the brokerages that reportedly experienced “technical difficulties” at open. Robinhood, TD Ameritrade & other major brokerages experiencing technical difficulties at open, due to record volume. — TD Ameritrade (@TDAmeritrade) January 27, 2021There were reports of login issues on the TD desktop site, too. By 11 a.m. the issue was resolved, TD said:Access to the TD Ameritrade Mobile app has been resolved. AdRead more: Stocks fall sharply on Wall Street, led lower by tech stocksRelated: In GameStop saga unfolding on Wall Street, 2 Goliaths fall

In the span of just a few days last week, nearly every major online brokerage company eliminated commissions. StockTwits, a social networking firm for traders, launched its own no-fee online brokerage offering too. So as part of its Trade App online brokerage, users can post or "tradecast" their history of trades. Unlike its free stock trading platform, TradeStation will charge small commissions to trade bitcoin, ethereum, ripple/XRP and several other cryptocurrencies. Webull, another commission-free online trading platform, makes money from lending products, such as margin loans to customers who want to borrow money to buy more stocks, according to CEO Anthony Denier.

Spencer Platt/Getty ImagesNEW YORK - Zero is now the hottest number in the online brokerage industry. Last week, a smaller competitor, Interactive Brokers Group, started its new IBKR Lite service, which also eliminated commissions for US-listed stocks and ETFs. Shares of all four companies were hit hard in the past two days as investors worried about the impact that zero commission trading would have on their profits. E-Trade's move was all but inevitable after Schwab and TD Ameritrade each announced that they were ending commissions for investors trading stocks, futures and options. The entire discount brokerage industry is dealing with brutal competition from upstarts like Robinhood, which already offers trading services with no or low commissions via popular mobile apps.

Charles Schwab fired the latest shot in the war over fees charged by online brokers, announcing that it plans to eliminate commissions for trading stocks, ETFs and options on its mobile and web platforms. NEW YORK - An all-out price war has hit the brokerage industry as both Charles Schwab and TD Ameritrade have announced they will eliminate commissions for certain securities. Charles Schwab fired Tuesday's first shot in the war over fees charged by online brokers, announcing in the morning that it plans to eliminate commissions for trading stocks, ETFs and options on its mobile and web platforms. Investors will probably expect both discount brokers to counter the moves of Schwab and Interactive Brokers or risk losing market share. It said that as of Oct. 3, its US brokerage firm "will eliminate commissions for its online exchange-listed stock, ETF (domestic and Canadian), and option trades, moving from $6.95 to $0."