Investment banks are financial intermediaries that help corporations, governments, and institutions raise capital and execute large transactions. On the FINRA SIE Exam, you need to know the specific functions investment banks perform, how they differ from commercial banks, and the roles they play in underwriting, advising, and facilitating securities transactions.
Investment banks help issuers raise capital by underwriting new securities offerings. Underwriting means the investment bank purchases securities from the issuer and resells them to investors, assuming the risk that the securities may not sell at the expected price.
There are three primary underwriting arrangements:
The spread is the difference between what the underwriter pays the issuer and what it sells the securities to the public for. This is the underwriter's compensation.

For large offerings, a syndicate is formed where multiple investment banks work together to underwrite and distribute the securities. The managing underwriter (or lead manager) organizes the syndicate, negotiates with the issuer, and allocates securities to syndicate members.
Syndicate members include:
The syndicate letter (or agreement among underwriters) details each member's commitment and liability. In a Western (divided) account, each member is responsible only for its own allocation. In an Eastern (undivided) account, members are jointly responsible for any unsold shares based on their participation percentage.

Investment banks provide advisory services to corporations regarding strategic transactions. In mergers and acquisitions (M&A), investment banks advise on valuations, negotiation strategies, deal structuring, and financing options.
Key advisory functions include:
Investment banks act as market makers or dealers by maintaining inventories of securities and standing ready to buy or sell from their own accounts. This provides liquidity to the secondary market.
As market makers, investment banks:
Investment banks also engage in proprietary trading, using their own capital to profit from market movements, though this has been restricted by regulations like the Volcker Rule.

Investment banks employ research analysts who produce reports on companies, industries, and market conditions. These reports include buy, sell, or hold recommendations and earnings estimates.
Research functions include:
Important regulatory considerations:
Investment banks facilitate private placements, where securities are sold directly to a limited number of sophisticated investors without a public offering. These transactions are exempt from full SEC registration under Regulation D.
Key characteristics:
Investment banks advise companies facing financial distress on restructuring debt, renegotiating obligations, or pursuing bankruptcy reorganization.
Services include:
1. Scenario: A question describes an investment bank agreeing to sell as much of a new issue as possible but not guaranteeing the issuer a specific amount of proceeds. The question asks who bears the risk.
Correct Approach: The issuer bears the risk because this is a best efforts underwriting where the investment bank acts as agent, not principal.
Check first: Whether the investment bank purchases the securities or merely agrees to use its best efforts to sell them.
Do NOT do first: Assume the underwriter always bears risk; in best efforts, the underwriter does not buy the securities and therefore assumes no financial risk.
Why other options are wrong: Firm commitment would mean the underwriter bears risk, but the question specifies no guarantee, ruling out firm commitment; all or none is a subset of best efforts where the entire issue must sell or the deal is cancelled, but the risk still rests with the issuer.
2. Scenario: A syndicate member in a Western account commits to 20% of a 1,000,000 share offering. After the offering closes, 100,000 shares remain unsold across the entire syndicate. The question asks how many unsold shares this member is responsible for.
Correct Approach: In a Western (divided) account, each member is liable only for their own unsold shares, not for shares allocated to other members, so you need to know only their unsold portion, not the syndicate total.
Check first: Whether the account is Western (divided) or Eastern (undivided) because liability calculation depends entirely on this distinction.
Do NOT do first: Multiply the total unsold shares (100,000) by the member's percentage (20%) to get 20,000; this calculation applies to Eastern accounts, not Western accounts.
Why other options are wrong: The syndicate-wide unsold total is irrelevant in a Western account; only the specific member's allocated shares matter; Eastern account rules would distribute unsold shares proportionally, but the question specifies Western.
3. Scenario: An investment bank is quoted as willing to buy shares at $50 and sell shares at $50.25. The question asks what this represents.
Correct Approach: This is a bid-ask quote where the investment bank is acting as a market maker; $50 is the bid (buy price) and $50.25 is the ask (sell price), with a $0.25 spread.
Check first: The context indicates secondary market trading where the firm is quoting prices from its own inventory, confirming market making activity.
Do NOT do first: Confuse this with underwriting a new issue; market making occurs in the secondary market with existing securities, not new issues in the primary market.
Why other options are wrong: Underwriting spread applies to new issues between issuer and public offering price, not ongoing secondary market quotes; this is not an underwriting scenario because no new capital is being raised for an issuer.
4. Scenario: A question asks what mechanism prevents investment banking deal information from influencing research analyst recommendations on the same company.
Correct Approach: Chinese Walls are informational barriers designed to separate investment banking and research departments to prevent conflicts of interest.
Check first: The question is addressing conflict of interest between departments within the same firm, pointing to internal information controls.
Do NOT do first: Suggest disclosure as the primary mechanism; while disclosure is required, Chinese Walls are the structural separation that prevents information flow in the first place.
Why other options are wrong: Suitability standards apply to recommendations for customers, not internal conflicts; due diligence is an underwriting function, not a conflict prevention tool; disclosure supplements but does not replace structural separation.
5. Scenario: A company wants to raise capital by selling securities to a small group of wealthy individuals and institutions without going through the full public offering process. The question asks what type of transaction this describes.
Correct Approach: This is a private placement, typically conducted under Regulation D, where securities are sold to accredited investors without full SEC registration.
Check first: Whether the question mentions limited investors, no public solicitation, or exemption from registration-all indicators of private placement.
Do NOT do first: Assume all capital raising requires public offerings and full registration; private placements are a significant exemption used for sophisticated investors.
Why other options are wrong: An IPO is a public offering requiring full registration and broad distribution; a rights offering is to existing shareholders; a secondary offering involves already-public companies selling additional registered shares to the public.
Task: Determining Underwriting Liability in an Eastern Account
Example:
Total offering: 1,000,000 shares
Member participation: 15%
Member allocation: 1,000,000 × 0.15 = 150,000 shares
Member sold: 140,000 shares
Member unsold from own allocation: 150,000 - 140,000 = 10,000 shares
Total syndicate unsold: 80,000 shares
Member's proportional share of all unsold: 80,000 × 0.15 = 12,000 shares
Member's total liability: 12,000 shares (in Eastern account, this replaces their individual unsold amount; they are responsible for their percentage of all unsold shares).
Task: Determining Underwriting Liability in a Western Account
Example:
Member allocation: 150,000 shares
Member sold: 140,000 shares
Member unsold: 150,000 - 140,000 = 10,000 shares
Member's total liability: 10,000 shares (syndicate-wide unsold shares are irrelevant).
Q1: An investment bank agrees to purchase an entire new issue of bonds from a municipality at a negotiated price and then resells the bonds to investors. What type of underwriting is this?
(a) Best efforts
(b) Firm commitment
(c) All or none
(d) Standby
Ans: (b)
This is a firm commitment underwriting where the investment bank purchases the entire issue and assumes the risk of resale. In best efforts (a), the bank would not purchase the securities but merely agree to sell them as agent. All or none (c) is a type of best efforts where the entire issue must sell or the offering is cancelled. Standby (d) is used in rights offerings, not new issues.
Q2: In a syndicate organized as an Eastern account, a member with a 10% participation has sold all of its allocated shares. However, 200,000 shares remain unsold by other syndicate members. How many shares is this member responsible for?
(a) 0 shares
(b) 10,000 shares
(c) 20,000 shares
(d) 200,000 shares
Ans: (c)
In an Eastern (undivided) account, all members share liability for unsold shares proportionally based on their participation percentage, regardless of whether they sold their own allocation. The member is responsible for 10% of the 200,000 unsold shares = 20,000 shares. Answer (a) would apply to a Western account where the member sold their entire allocation. Answer (b) represents an arbitrary figure. Answer (d) would mean the member bears all unsold shares, which is incorrect.
Q3: An investment bank maintains an inventory of securities and quotes prices at which it is willing to buy and sell these securities to customers. This activity is best described as:
(a) Underwriting
(b) Advisory services
(c) Market making
(d) Private placement
Ans: (c)
Market making involves quoting bid and ask prices and trading from inventory to provide liquidity in the secondary market. Underwriting (a) involves raising capital in the primary market for issuers. Advisory services (b) provide strategic advice, not trading. Private placements (d) involve selling unregistered securities to accredited investors, not maintaining trading inventories.
Q4: Which of the following is designed to prevent conflicts of interest between the investment banking and research departments of the same firm?
(a) Suitability requirements
(b) Chinese Walls
(c) Regulation D
(d) Due diligence
Ans: (b)
Chinese Walls are informational barriers that separate departments to prevent deal information from influencing research recommendations. Suitability requirements (a) ensure recommendations are appropriate for customers but do not address internal conflicts. Regulation D (c) governs private placements. Due diligence (d) is the investigation process during underwriting, not a conflict prevention mechanism.
Q5: A corporation wants to raise capital by selling securities to 25 institutional investors without registering with the SEC. This transaction is most likely a:
(a) Public offering
(b) Rights offering
(c) Private placement
(d) Secondary offering
Ans: (c)
A private placement allows issuers to raise capital by selling to a limited number of accredited investors without full SEC registration, typically under Regulation D. A public offering (a) requires registration and broad distribution. A rights offering (b) is to existing shareholders of an already-public company. A secondary offering (d) involves registered sales of additional shares by a public company.
Q6: An investment bank advising a target company on defense strategies against a hostile takeover is performing which function?
(a) Underwriting
(b) Market making
(c) Advisory services
(d) Research
Ans: (c)
Advisory services include M&A advice, valuations, and defense strategies-strategic counsel rather than capital raising or trading. Underwriting (a) is raising capital through new securities offerings. Market making (b) is providing liquidity through trading. Research (d) produces investment reports and recommendations, not strategic transaction advice.