Clicks and beeps from the laptop were filling the room. The screen was full of moving graphs, and Claire was switching between various windowed applications to maximise her efficiency in flipping the blue chip shares.
Unlike usual corporate banks who had operators and dealers to sell the stock, the Sub System itself eliminated the middlemen functioning as a stockbroker.
It initially seemed inconceivable, especially since the security, flow of the money and shares were tightly regulated, but most people might not consider that there was a black market even for the stock market. (or had knowledge of its existence.)
Those blue chip shares might not mean much in the normal market since they were mostly associated with smaller companies. However, its a totally different story on the black stock market. The blue chips were ironically the shares of famous public multinational companies, and that meant one blue chip could potentially go up for millions per share.