Free FINRA Series 79 (Investment Banking Representative) Formula and Limits Sheet (2026)

Every Series 79 formula you need on the test, grouped by topic and rendered with full math notation. 87 formulas across 3 topics, calibrated to the 2026 syllabus. Free forever, no signup required.

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All Series 79 Formulas

Collection, Analysis and Evaluation of Data 20 items
Balance sheet identity (accounting equation)
Assets=Liabilities+Stockholders’ Equity\text{Assets} = \text{Liabilities} + \text{Stockholders' Equity}, Assets = resources owned, Liabilities = obligations owed, Stockholders' Equity = residual owner claim
Asset turnover ratio
Asset Turnover=RevenueAverage Total Assets\text{Asset Turnover} = \dfrac{\text{Revenue}}{\text{Average Total Assets}}, Revenue = period sales; Average Total Assets = beginning plus ending total assets, divided by two; some texts use period-end total assets instead
Operating income
Operating Income=Gross Profit−SG&A−D&A\text{Operating Income} = \text{Gross Profit} - \text{SG\&A} - \text{D\&A}, SG&A = selling/general/admin overhead, D&A = depreciation and amortization
Gross profit
Gross Profit=Revenue−COGS\text{Gross Profit} = \text{Revenue} - \text{COGS}, Revenue = sales, COGS = cost of goods sold (direct cost of units sold)
DuPont identity (return on equity)
ROE=NIRev×RevAssets×AssetsEquityROE = \frac{NI}{Rev} \times \frac{Rev}{Assets} \times \frac{Assets}{Equity}, NI = net income, Rev = revenue; terms are net margin, asset turnover, equity multiplier
Interest coverage (times-interest-earned) ratio
Interest Coverage=EBITInterestInterest\ Coverage = \frac{EBIT}{Interest}, EBIT = earnings before interest and taxes, Interest = interest expense; EBITDA variant reads higher
Quick (acid-test) ratio
Quick=Cash+MS+ARCL\text{Quick} = \frac{\text{Cash} + \text{MS} + \text{AR}}{\text{CL}} or CA−InvCL\frac{\text{CA} - \text{Inv}}{\text{CL}}; MS = marketable securities, AR = net receivables, CA = current assets, Inv = inventory, CL = current liabilities
Cash conversion cycle
CCC=DSO+DIO−DPOCCC = DSO + DIO - DPO, DSO = days sales outstanding, DIO = days inventory outstanding, DPO = days payables outstanding
Enterprise value bridge
EV=Market Cap+D+P+MI−CEV = \text{Market Cap} + D + P + MI - C, D = total debt, P = preferred stock, MI = minority interest, C = cash and equivalents
PEG ratio
PEG=P/EgPEG = \dfrac{P/E}{g}, P/E = price-to-earnings ratio, g = expected earnings growth rate in percentage points
Implied enterprise value from peer multiple
Implied EV=(Peer MedianEVEBITDA)×EBITDAt\text{Implied EV} = \left(\text{Peer Median} \tfrac{EV}{EBITDA}\right) \times EBITDA_t, EBITDAtEBITDA_t = target EBITDA
Market capitalization (equity value)
Market Cap=P×S\text{Market Cap} = P \times S, P = price per share, S = common shares currently outstanding; using fully diluted shares instead gives fully diluted equity value
Terminal value (Gordon growth)
TV=FCFn×(1+g)WACC−gTV = \frac{FCF_n \times (1+g)}{WACC - g}, FCFnFCF_n = final-year free cash flow, g = long-run growth rate, WACC = weighted average cost of capital
Unlevered free cash flow
UFCF=EBIT(1−t)+D&A−CapEx−ΔNWCUFCF=EBIT(1-t)+D\&A-CapEx-\Delta NWC. EBIT: operating income; t: tax rate; D&A: depreciation & amortization; CapEx: capital expenditures; ΔNWC: operating net working capital change (excludes cash and equivalents, interest-bearing debt).
Weighted average cost of capital
WACC=ED+E re+DD+E rd(1−t)WACC = \frac{E}{D+E}\,r_e + \frac{D}{D+E}\,r_d (1 - t), E = equity, D = debt, rer_e = cost of equity, rdr_d = cost of debt, t = tax rate
Cost of equity (CAPM)
re=rf+β (rm−rf)r_e = r_f + \beta\,(r_m - r_f), rer_e = cost of equity, rfr_f = risk-free rate, β = beta, rmr_m = expected market return, (rm−rf)(r_m - r_f) = equity risk premium
Sum-of-the-parts equity value
Equity Value=∑i(EBITDAi×Multiplei)−Net Debt−PV(Corp. Costs)\text{Equity Value}=\sum_i(\text{EBITDA}_i\times\text{Multiple}_i)-\text{Net Debt}-PV(\text{Corp. Costs}); each segment i uses its own peer EV/EBITDA multiple; PV(Corp. Costs): capitalized value of corporate costs not in segment values.
LBO sponsor internal rate of return
IRR=(Exit EquityEntry Equity)1/n−1IRR = \left(\dfrac{\text{Exit Equity}}{\text{Entry Equity}}\right)^{1/n} - 1, assuming no interim equity contributions or distributions; Exit Equity = exit EV − remaining net debt, Entry Equity = equity invested, n = years held
Gordon constant-growth dividend discount model price
P0=D1r−gP_0 = \dfrac{D_1}{r - g}, where D1=D0(1+g)D_1 = D_0(1+g); D0D_0 = current dividend, g = growth rate, r = required return (needs r > g)
Economic profit
Economic Profit=NOPAT−(Invested Capital×WACC)\text{Economic Profit} = \text{NOPAT} - (\text{Invested Capital} \times \text{WACC}), NOPAT = net operating profit after tax, WACC = weighted average cost of capital
Underwriting, Offerings and Registration of Securities 9 items
Issuer net proceeds from an offering
Net=(POP−spread)×N\text{Net} = (POP - \text{spread}) \times N, Net = issuer proceeds after underwriting spread but before other offering expenses, POP = public offering price per share, spread = gross spread per share, N = shares sold by the issuer
Gross spread (underwriting)
Gross spread=MF+UF+SC\text{Gross spread} = MF + UF + SC, MF = management fee, UF = underwriting fee, SC = selling concession (per share or total)
Greenshoe (over-allotment) option size
G=N×0.15G = N \times 0.15, G = maximum extra shares, N = base offering shares, 0.15 = 15% cap
Syndicate short-covering gain
Gain=(P−Pm)×G\text{Gain} = (P - P_m) \times G, P = offering price, PmP_m = market cover price, G = greenshoe shares covered
Gross spread per share
s=P×gs = P \times g, s = spread per share, P = public offering price, g = gross spread percentage
Net proceeds to issuer per share
Pnet=P−sP_{net} = P - s, PnetP_{net} = issuer proceeds per share after underwriting spread but before other offering expenses, P = offering price, s = gross spread per share
Rule 5122 maximum offering costs and sales compensation
Max costs=0.15×P\text{Max costs} = 0.15 \times P, P = gross proceeds of a member private offering subject to Rule 5122; the limit covers offering costs, discounts, commissions and other cash or non-cash sales incentives combined
Rule 5122 minimum proceeds to disclosed business purpose
Min business use=0.85×P\text{Min business use} = 0.85 \times P, P = gross offering proceeds of a member private placement
Rule 144 affiliate volume cap (maximum three-month sale)
Listed: max⁡(1%SO,AWV4wk)\max(1\%SO,AWV_{4wk}); OTC: 1%SO1\%SO. 3-mo. rolling total (not fixed 90d). SO: same-class shares out.; AWV: eligible avg wkly reported trade vol., 4 cal wks pre Form 144 filing or, if none required, sale order/direct execution.
Mergers and Acquisitions, Tender Offers and Financial Restructuring 9 items
Excess parachute payment under IRC Section 280G
E=T−BE=T-B pre reasonable-comp. adjustments if covered change-in-control payments' total PV ≥3B\geq3B. E/T: total excess/covered parachute payments; B: avg annualized includible compensation, prior 5 taxable years or shorter service period.
Section 4999 golden parachute excise tax
Tax=0.20×ETax = 0.20 \times E, E = excess parachute payment determined under Section 280G; for covered change-in-control payments, the trigger is aggregate present value of at least three times the base amount
New shares issued in a stock-financed deal
Snew=PpS_{new} = \dfrac{P}{p}, P = total purchase price paid in stock, p = acquirer share price
Pro forma EPS in an all-stock acquisition
EPSpf=NIA+NITSA+SnewEPS_{pf} = \dfrac{NI_A + NI_T}{S_A + S_{new}}, NIANI_A = acquirer net income, NITNI_T = target net income, SAS_A = acquirer shares, SnewS_{new} = new shares issued
Goodwill in purchase accounting
Goodwill=P−FV(NIA)\text{Goodwill}=P-FV(NIA). 100% acquisition, no previously held interest; P: purchase price, FV of total consideration transferred; NIA: net identifiable assets, identifiable assets acquired less liabilities assumed; FV: fair value.
Pro forma combined earnings per share
PF EPS=NIA+NIT+S(1−t)−Inew(1−t)SharesA+Sharesnew\text{PF EPS} = \dfrac{NI_A + NI_T + S(1-t) - I_{new}(1-t)}{\text{Shares}_A + \text{Shares}_{new}}, NI = net income, S = pre-tax synergies, t = tax rate, InewI_{new} = incremental interest
Breakeven pre-tax synergy
SBE=after-tax EPS shortfall×shares1−tS_{BE} = \dfrac{\text{after-tax EPS shortfall} \times \text{shares}}{1-t}, SBES_{BE} = pre-tax synergy to reach breakeven, t = tax rate, shares = pro forma share count
Exchange ratio in a stock deal
Exchange Ratio=Offer Price per Target ShareAcquirer Share Price\text{Exchange Ratio} = \dfrac{\text{Offer Price per Target Share}}{\text{Acquirer Share Price}}, multiply by target shares to get new shares issued
Creditor recovery rate in a liquidation waterfall
Recovery rate=Amount paid to classClass claim\text{Recovery rate} = \dfrac{\text{Amount paid to class}}{\text{Class claim}}, amount paid = lesser of remaining proceeds available to the class and its total allowed claim; class claim = total allowed claim of that tier

Series 79 Limits and Thresholds

Collection, Analysis and Evaluation of Data 17 items
Form 8-K reports material events within 4 business days of the triggering event under Rules 13a-11/15d-11.
Interest coverage below roughly 1.5x to 2.0x leaves a thin margin for error in servicing debt.
The DuPont identity decomposes ROE into net margin × asset turnover × equity multiplier.
The cash conversion cycle equals DSO + DIO − DPO.
Net debt/EBITDA above roughly 4x to 5x signals aggressive leverage in most industries.
Long-run terminal growth g is often assumed to be roughly 2% to 3%, but must be below WACC and consistent with sustainable long-run economic growth.
Control premiums in acquisitions typically run 20% to 40% over the target's unaffected share price.
Financial (private equity) buyers typically exit in three to seven years and are disciplined by an IRR hurdle.
Terminal value often represents 60% to 80% of total DCF value, driving its sensitivity to WACC and g.
A REIT generally must distribute at least 90% of taxable income, excluding net capital gain, to qualify for REIT tax treatment; undistributed taxable income remains subject to entity-level tax.
An S corporation is limited to 100 shareholders and one class of stock; eligible shareholders include U.S. citizens or residents, estates, certain trusts, and certain tax-exempt organizations.
Rule 144A QIB: generally eligible institution owning and discretionarily investing ≥$100 million in unaffiliated issuers' securities. 3(c)(7) individual qualified purchaser: owns ≥$5 million in investments.
Under Rule 14d-9, a target's board must file its Schedule 14D-9 recommendation within ten business days.
SEC Rule 176 lists the factors for judging whether a defendant's investigation and belief were reasonable under Section 11.
Under SOX Title IV, Section 402 bars personal loans to executives, Section 403 requires insider transaction reporting, and Section 404 requires management's ICFR assessment.
SOX Section 403 accelerated insider trade disclosure, requiring insiders to report transactions within two business days.
Section 11 of the Securities Act of 1933 imposes liability for a materially false or misleading registration statement; defendants other than the issuer may establish a due-diligence defense.
Underwriting, Offerings and Registration of Securities 16 items
An emerging growth company has annual gross revenue below $1.235 billion; absent an earlier disqualifying event, status ends at fiscal-year end following the IPO's five-year anniversary.
Rule 163 allows WKSI offers before filing. Rule 163A generally shields issuer messages >30 days pre-filing that omit the offering; exclusions apply, plus reasonable steps against redistribution after the cutoff.
Rule 405 WKSI: ≥$700 million non-affiliate common-stock float, or ≥$1 billion of nonconvertible, non-common-equity securities issued for cash in registered primary offerings over prior 3 years; other eligibility rules apply.
Research safe harbors are Rule 137 (not in the deal), Rule 138 (different class), and Rule 139 (regular-course coverage).
Lock-up agreements commonly restrict insiders and the issuer from selling additional shares for 90 to 180 days after the offering.
Dealer aftermarket prospectus delivery: generally 40 days, or 90 days if no prior registered offering. Rule 174: listed IPO, 25 calendar days; already-reporting issuer, none. Rule 172 may meet eligible delivery duties.
Gross spread equals management fee plus underwriting fee plus selling concession.
Section 10(a)(3): a prospectus used over 9 months after effectiveness must have information dated no more than 16 months before use, insofar as known or furnishable without unreasonable effort or expense.
Reg M, absent exception: 1 business day before pricing if ADTV ≥$100,000 and public float ≥$25 million; else 5 business days before pricing. Later participation start controls; end at completion.
The greenshoe (over-allotment) option lets underwriters buy up to 15% more shares than the base deal to cover over-allotments.
Rule 104 permits stabilizing bids at or below the offering price, subject to its initiation and maintenance limits; the highest independent bid is not a universal ceiling.
Reg M Rule 101's actively traded exception needs ADTV ≥$1 million and public float ≥$150 million, if the security is not issued by the distribution participant or an affiliate. It does not exempt issuer buys under Rule 102.
Rule 144's holding period is 6 months once the issuer has reported for 90 days and 1 year otherwise, and Rule 5122 requires at least 85% of proceeds to fund the disclosed business purpose.
Rule 506(b) permits up to 35 non-accredited sophisticated purchasers in any 90-calendar-day period with no general solicitation, while Section 4(a)(5) caps accredited-only deals at $5 million.
FINRA Rule 11880: final syndicate-account settlement within 90 days of syndicate settlement date; corporate-debt offerings require ≥70% of each member's gross due paid within 30 days. Rule 4511 default retention: 6-year.
Regulation A allows Tier 1 to raise up to $20 million and Tier 2 up to $75 million in a 12-month period, versus Rule 504's $10 million cap.
Mergers and Acquisitions, Tender Offers and Financial Restructuring 16 items
An IRC Section 338(h)(10) election treats a legal stock purchase as an asset purchase for tax, giving the buyer a stepped-up basis.
Tax-free acquisitive reorganization generally needs stock consideration and continuity of interest. cash boot in otherwise qualifying deal generally triggers gain up to lesser of realized gain or boot received.
Golden parachute rules under IRC Sections 280G and 4999 impose a 20% excise tax once total change-of-control payments reach 3x the executive's base amount, taxing the excess over 1x base.
The Hart-Scott-Rodino Act requires pre-merger notification to the FTC and DOJ and a 30-day waiting period, shortened to 15 days for all-cash tender offers.
The exchange ratio equals offer price per target share divided by acquirer share price, setting the new shares issued in a stock deal.
In an all-stock deal before synergies and other deal adjustments, it is accretive when the acquirer's P/E exceeds the target's P/E at the offer price, breakeven when equal, and dilutive when lower.
If a fairness opinion will reach public shareholders, FINRA Rule 5150 requires disclosing contingent or success-based compensation and compensated material relationships with a deal party in the past two years or contemplated.
Under public-company U.S. GAAP, goodwill equals purchase price minus the fair value of net identifiable assets, and it is not amortized but tested annually for impairment.
Rule 14e-1: tender offer generally open ≥20 business days from commencement and ≥10 business days after notice of price or percentage-sought change. Periods may overlap; accepting ≤2% more of class is excepted.
Schedule TO is filed under Section 14(d)(1) by a third-party bidder and under Section 13(e)(1) by an issuer.
Regulation 14D applies to third-party tender offers once the bidder would hold more than 5% of a class of equity registered under Section 12.
Rule 13e-4 governs an issuer tender offer (buyback by tender) while Rule 13e-3 governs going-private transactions by the issuer or affiliates.
For a registered stock-for-stock business combination, a domestic corporate issuer generally uses Form S-4, while Regulation 14A governs an applicable proxy solicitation for the shareholder vote.
Rule 145 treats certain mergers and reclassifications as sales requiring registration unless an exemption applies, while Rules 165 and 425 govern pre-effective deal communications.
Bankruptcy waterfall: senior secured, then junior secured, paid from collateral by lien priority/value; then priority unsecured, general unsecured, subordinated unsecured, preferred, and common stock last.
A court-approved Section 363 sale can convey bankruptcy assets free and clear of liens if statutory conditions are met; a stalking-horse bidder may set the floor price before an auction.
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