Investment banks are important financial intermediaries that help companies and governments raise capital through securities issuance. They also provide M&A advisory, research, and other services. There are four major business lines of investment banks that are closely related to investment commercials: investment banking division, sales and trading, equity research, and asset management.

Investment Banking Division Handles IPOs, M&A Deals
The investment banking division (IBD) handles capital raising through IPOs, follow-on offerings, and private placements. It also advises on mergers, acquisitions, divestitures, and restructurings. Investment bankers pitch IBD services through commercials and marketing materials.
Sales and Trading Distributes New Issues of Securities
The sales and trading division distributes new issues of securities from investment banking deals. Salespeople market securities through commercials, email, and phone calls. Traders execute orders and provide liquidity to markets.
Equity Research Analysts Publish Reports to Attract Investors
Equity research analysts publish reports on companies to attract investor interest. Their commercials and marketing materials aim to highlight their research capabilities. Research helps the investment bank win more deals.
Asset Management Commercials Promote Investment Products
The asset management arm offers investment products like mutual funds to investors. It uses commercials and advertising to promote products and attract assets under management.
In summary, the major business lines of investment banks all utilize investment commercials for promotion. IBD commercials pitch capital raising and advisory services. Sales and trading commercials market new securities issues. Research commercials highlight analysts’ capabilities. Asset management commercials promote investment products.