The Trading Floor Cheat Sheet: Every Asset Class Explained¶

Walk onto a trading floor for the first time and you’ll be overwhelmed. Screens everywhere. People talking about “the curve” and “repo” and “25-delta risk reversals” like it’s casual dinner conversation. You’ll hear numbers in the billions thrown around like loose change. And somewhere in the corner, someone is arguing about whether SOFR is better than LIBOR (spoiler: it is, because LIBOR got caught lying).

But here’s the secret: underneath all the jargon, financial markets are just a giant network of people buying and selling stuff. Different stuff, with different rules, but stuff nonetheless. This article is your cheat sheet to all of it.

Overview of Financial Markets¶

Financial markets can be broadly categorized by the type of instrument traded. Here’s the bird’s-eye view:

Read that FX number again. $7.5 trillion. Per day. That’s roughly the entire annual GDP of Germany and France combined, traded every single business day. The stock market that CNBC obsesses over? It’s a rounding error compared to FX.

These markets are interconnected like dominoes. A change in interest rates affects bond prices, which influences equity valuations, which moves currency markets. Understanding each asset class individually is the first step toward understanding the system as a whole.

1. Interest Rates¶

What Are Interest Rates?¶

Interest rates represent the cost of borrowing money or the return on lending it. They are the most fundamental price in all of finance because they influence the valuation of virtually every other asset class.

Think of interest rates as the “price of money.” When rates are low, money is cheap (everyone borrows and spends. When rates are high, money is expensive) people think twice before taking out loans. That’s why when the Fed changes rates by 0.25%, the entire financial world collectively loses its mind.

Key Benchmark Rates¶

LIBOR (London Interbank Offered Rate): Historically the most important benchmark, LIBOR represented the rate at which major global banks lent to one another in the interbank market. It was published for five currencies and seven tenors (overnight, 1 week, 1/2/3/6/12 months). LIBOR was phased out after 2023 due to manipulation scandals and the transition to alternative rates.

LIBOR’s downfall: turns out when you ask banks “hey, what rate would you lend at?” and the answer affects trillions of dollars in contracts, some banks get a little… creative with their answers.

SOFR (Secured Overnight Financing Rate): The replacement for USD LIBOR. SOFR is based on actual overnight repurchase agreement transactions secured by U.S. Treasury securities. It is considered more robust because it is based on real transactions (approximately $1 trillion in daily volume) rather than bank estimates.

Other major benchmarks include ESTR (Euro Short-Term Rate) for EUR, SONIA (Sterling Overnight Index Average) for GBP, and TONAR (Tokyo Overnight Average Rate) for JPY.

The Yield Curve¶

The yield curve plots interest rates (yields) against different maturities. It is one of the most important tools in finance, arguably the most-stared-at chart on any rates trading desk.

Yield (%)
  5.0 |                                          ___________
  4.5 |                                    _____/
  4.0 |                              _____/
  3.5 |                        _____/
  3.0 |                  _____/
  2.5 |            _____/
  2.0 |      _____/
  1.5 | ____/
      |________________________________________________
       1M   3M   6M   1Y   2Y   5Y   10Y   20Y   30Y
                        Maturity

Normal yield curve: Upward sloping (longer maturities yield more). This makes intuitive sense: if you lend someone money for 30 years instead of 3 months, you want more compensation. More time = more risk = more yield. This reflects what we call the term premium.

Inverted yield curve: Short-term rates exceed long-term rates. Historically, this has been a reliable predictor of recessions. An inverted curve suggests markets expect the central bank to cut rates in the future due to economic weakness. When the curve inverts, financial journalists start using the word “recession” approximately 400% more often.

Flat yield curve: Minimal difference between short and long-term rates, often a transitional state. It’s the curve’s way of saying “I haven’t made up my mind yet.”

Why Rates Matter¶

• Central bank policy: The Federal Reserve sets the federal funds rate, which cascades through the entire economy
• Bond pricing: Bond prices move inversely with interest rates
• Mortgage rates: Home borrowing costs are linked to the 10-year Treasury yield
• Corporate decisions: Companies compare the cost of borrowing against expected returns on investment
• Currency values: Higher interest rates attract foreign capital, strengthening the currency

Who Trades Interest Rates?¶

Central banks, commercial banks, pension funds, insurance companies, hedge funds, and sovereign wealth funds. Interest rate markets are the largest in the world by notional value. If you work in finance, rates will affect your life whether you trade them or not.

2. Rate Derivatives¶

What Are Rate Derivatives?¶

Rate derivatives are financial contracts whose value is derived from interest rates. They allow market participants to hedge against or speculate on changes in interest rates without buying or selling the underlying bonds or loans.

“Derived from”, that’s why they’re called derivatives. See? Finance naming conventions occasionally make sense.

Interest Rate Swaps (IRS)¶

An interest rate swap is an agreement between two parties to exchange interest rate payments on a notional principal amount. The most common type is a plain vanilla swap where one party pays a fixed rate and receives a floating rate, while the counterparty does the opposite.

Think of it as two neighbors trading lawn chores. One says “I’ll mow your lawn every Saturday” (fixed), the other says “I’ll do yours whenever it rains” (floating). They swap obligations, and only the difference matters.

Concrete Example: 5-Year Interest Rate Swap

• Notional Principal: $100 million
• Fixed Rate Payer: Corporation ABC (pays 3.50% fixed annually)
• Floating Rate Payer: Bank XYZ (pays 3-month SOFR, reset quarterly)
• Tenor: 5 years
• Payment Frequency: Quarterly

Suppose at the start of Q1, 3-month SOFR is 3.20%.

Q1 Payment Calculation:
- Corporation ABC (fixed payer) owes: $100M x 3.50% x (90/360) = $875,000
- Bank XYZ (floating payer) owes: $100M x 3.20% x (90/360) = $800,000
- Net payment: Corporation ABC pays Bank XYZ $75,000

Now suppose in Q2, SOFR rises to 4.00%.
- Fixed payment: $100M x 3.50% x (90/360) = $875,000
- Floating payment: $100M x 4.00% x (90/360) = $1,000,000
- Net payment: Bank XYZ pays Corporation ABC $125,000

The tables turned. Corporation ABC locked in its rate and now benefits from the rate increase. That’s the whole point.

Key Insight: In a swap, only the net difference is exchanged, the notional principal never changes hands. This is why the notional amount can be enormous ($100 million+) while actual cash flows are relatively small. Nobody is actually wiring $100 million back and forth. It’s more like keeping a running tab.

Why use swaps? A company with a floating-rate loan can enter a swap to effectively convert it to a fixed rate, removing interest rate uncertainty from its financial projections. CFOs love certainty. Swap desks love CFOs.

Forward Rate Agreements (FRAs)¶

A Forward Rate Agreement is a contract that determines the interest rate to be paid or received on a deposit beginning at a future start date. Think of it as a single-period interest rate swap, the swap’s little sibling.

Example: A 3x6 FRA at 4.00% is an agreement to borrow/lend at 4.00% for 3 months, starting 3 months from now. If the actual rate in 3 months turns out to be 4.50%, the FRA buyer (who locked in 4.00%) profits from the 0.50% difference.

Caps and Floors¶

An interest rate cap is a series of call options on a reference rate (each individual option is called a “caplet”). A floor is a series of put options on the rate (each individual option is called a “floorlet”).

Example: Interest Rate Cap
- A borrower with a floating-rate loan at SOFR + 1.00% buys a 5-year cap at 5.00%
- If SOFR exceeds 5.00% in any period, the cap pays the difference
- If SOFR hits 6.50%, the cap pays 1.50% on the notional for that period
- The borrower’s effective rate is capped at 6.00% (5.00% cap + 1.00% spread)

This is essentially insurance against rising rates, and the borrower pays a premium for this protection. It’s like buying a ceiling for your interest rate, hence the name “cap.”

3. Foreign Exchange (Forex)¶

What Is Forex?¶

The foreign exchange market is the largest financial market in the world, with approximately $7.5 trillion traded daily. It is where currencies are bought and sold. Unlike stock exchanges, FX is a decentralized over-the-counter (OTC) market operating 24 hours a day, 5 days a week across global time zones.

When Tokyo closes, London opens. When London closes, New York opens. When New York closes, Sydney opens. The money never sleeps. (Neither do junior FX traders, apparently.)

Currency Pairs¶

Currencies are always quoted in pairs. The first currency is the base currency and the second is the quote currency.

Example: EUR/USD = 1.0850
- This means 1 Euro buys 1.0850 US Dollars
- If you buy EUR/USD, you are buying Euros and selling Dollars
- If EUR/USD rises to 1.0950, the Euro has strengthened (appreciated) against the Dollar

Major pairs (most liquid):

Why “Cable”? Because in the 19th century, the GBP/USD exchange rate was transmitted between London and New York via a transatlantic cable. The name stuck. Traders are sentimental like that.

Spot vs. Forward¶

Spot FX is the exchange of currencies for immediate delivery (typically T+2, meaning two business days after the trade date).

Forward FX is an agreement to exchange currencies at a predetermined rate on a future date. The forward rate differs from the spot rate based on the interest rate differential between the two currencies.

Example:
- Spot EUR/USD: 1.0850
- US interest rate (3-month): 5.25%
- Euro interest rate (3-month): 3.75%
- Interest rate differential: 1.50% (USD rate is higher)
- 3-month forward EUR/USD: approximately 1.0890

The forward price is higher because the USD has a higher interest rate, the market adjusts so there is no arbitrage between holding dollars and holding euros. If this sounds like magic, it’s actually just math. Very persistent, no-free-lunch math.

Understanding Pips¶

A pip (percentage in point) is the smallest standard price increment in FX. For most pairs, it is the fourth decimal place (0.0001). For JPY pairs, it is the second decimal place (0.01).

Example:
- EUR/USD moves from 1.0850 to 1.0873 = a move of 23 pips
- USD/JPY moves from 149.50 to 149.85 = a move of 35 pips

Pip value calculation:
For a standard lot (100,000 units of base currency) in EUR/USD:
Pip value = 100,000 x 0.0001 = $10 per pip

If you buy 1 lot of EUR/USD at 1.0850 and it rises to 1.0900 (50 pips), your profit is 50 x $10 = $500.

A pip sounds tiny until you realize institutional FX desks trade in lots of hundreds of millions. At that scale, a 1-pip move is a car payment.

Bid/Ask Spread¶

The bid is the price at which the market maker will buy the base currency (you sell), and the ask (or offer) is the price at which they will sell (you buy). The difference is the spread, the market maker’s profit.

Example:
- EUR/USD Bid: 1.0848 / Ask: 1.0850
- Spread: 0.0002 = 2 pips

Liquid pairs like EUR/USD have spreads as tight as 0.1-0.5 pips in the interbank market. Exotic pairs may have spreads of 10-50 pips or more.

The spread is how market makers eat. The tighter the spread, the more competitive the market. The wider the spread, the more the market maker is smiling.

4. Forex Options¶

What Are FX Options?¶

FX options give the holder the right, but not the obligation, to exchange a specified amount of one currency for another at a predetermined exchange rate (the strike) on or before a specific date. They function like equity options but with currencies as the underlying.

How FX Options Differ from Equity Options¶

Delta Quoting Convention¶

In the FX options market, options are often quoted by their delta rather than by strike price. This is because delta provides a standardized measure of moneyness that adjusts for volatility.

Common quotes:
- ATM (at-the-money): Delta = 50% (also called “ATM-DNS” or delta-neutral straddle)
- 25-delta call: A call with delta = 0.25 (out-of-the-money call)
- 25-delta put: A put with delta = -0.25 (out-of-the-money put)
- 10-delta call/put: Further out-of-the-money options

Example:
A trader requests pricing for “1-month 25-delta EUR/USD call.” The market maker quotes the implied volatility (e.g., 8.5%), from which the premium and exact strike are calculated.

If you ask for a “25-delta call” on an equity desk, people stare at you. If you ask by strike on an FX desk, people stare at you. Different desks, different languages.

Risk Reversals and Butterfly Spreads¶

FX options traders frequently use these structures:
- Risk Reversal (RR): The difference in implied volatility between an OTM call and OTM put at the same delta (e.g., 25-delta). A positive risk reversal means calls are more expensive than puts, indicating the market is skewed bullish.
- Butterfly (BF): The average of OTM call and put volatilities minus ATM volatility. It measures the curvature of the volatility smile.

5. Repo (Repurchase Agreements)¶

How Repo Works¶

A repurchase agreement (repo) is a short-term borrowing mechanism where one party sells securities to another with an agreement to repurchase them at a slightly higher price at a specified future date. Economically, it is a collateralized loan.

Think of it as going to a pawn shop, except the pawn shop is JP Morgan, the item you’re pawning is $100 million in government bonds, and you’re picking them back up tomorrow morning. Classy pawning.

Step-by-step:

1. Party A (borrower/seller) needs cash. They own $100 million in U.S. Treasuries.
2. Party A sells the Treasuries to Party B (lender/buyer) for $98 million (applying a 2% haircut).
3. Party A agrees to repurchase the Treasuries from Party B the next day (overnight repo) for $98 million + interest.
4. At the repo rate of 5.30% annualized, the overnight interest = $98M x 5.30% / 360 = $14,428
5. Party A repurchases the bonds for $98,014,428.

Day 1 (Opening):
Party A ----[Treasuries $100M]----> Party B
Party A <---[$98M cash]------------ Party B

Day 2 (Closing):
Party A <---[Treasuries $100M]---- Party B
Party A ----[$98,014,428 cash]---> Party B

Key Terms¶

• Repo Rate: The annualized interest rate on the cash loan
• Haircut: The difference between the market value of collateral and the cash lent, expressed as a percentage. A 2% haircut on $100M of collateral means only $98M is lent. This protects the lender against a decline in collateral value. Think of it as the lender saying “yeah, your bonds are worth $100M today, but what if they drop? I’ll lend you $98M just to be safe.”
• Term Repo: A repo with maturity longer than overnight (e.g., 1 week, 1 month, 3 months)
• Overnight Repo: Settled and unwound the next business day
• Reverse Repo: The same transaction from the lender’s perspective (Party B buys securities with agreement to sell them back)
• General Collateral (GC): Any acceptable security can be used as collateral
• Special Collateral: A specific security is requested, often at a lower (special) rate because it is in high demand

Why Banks Use Repo¶

1. Funding: Banks finance their bond inventories cheaply using repo rather than unsecured borrowing
2. Liquidity management: Repo allows banks to quickly convert securities into cash
3. Short selling: To short a bond, a trader borrows it through the repo market
4. Central bank operations: The Federal Reserve uses repo and reverse repo operations to implement monetary policy (the ON RRP facility)
5. Leverage: Hedge funds use repo to lever up their bond positions, buy bonds, repo them out for cash, buy more bonds with that cash

Key Insight: The repo market is the plumbing of the financial system. A disruption in repo markets (as occurred in September 2019 when repo rates spiked to 10%) can cascade across all financial markets. The Fed intervened by injecting $75 billion in overnight repo operations to stabilize rates. When the plumbing breaks, everything floods.

6. Treasury/Government Bonds¶

What Are Government Bonds?¶

Government bonds are debt securities issued by national governments to finance their operations and debt obligations. U.S. Treasury securities are considered the safest investments in the world because they are backed by the full faith and credit of the U.S. government.

The government is basically saying: “Lend us money, and we promise to pay you back. We’re good for it, we literally own the money printer.”

Types of U.S. Treasury Securities¶

The Auction Process¶

The U.S. Treasury issues securities through a competitive auction process. It’s one of the most important recurring events in financial markets:

1. Announcement: Treasury announces the details of the upcoming auction (amount, maturity, auction date)
2. Bidding: Two types of bids:
3. Competitive bids: Bidders specify the yield they are willing to accept. Allocated from lowest yield to highest until the full amount is sold.
4. Non-competitive bids: Bidders agree to accept whatever yield is determined by the auction. Guaranteed allocation up to $10 million per bidder.
5. Allotment: The stop-out yield is the highest yield accepted. All competitive bids at or below this yield are filled.
6. Settlement: Typically T+1 (one business day after auction).

Example: 10-Year T-Note Auction
- Amount offered: $42 billion
- Non-competitive bids: $2 billion
- Remaining for competitive allocation: $40 billion
- Bids received:
- $15B at 4.250%
- $12B at 4.255%
- $10B at 4.260%
- $8B at 4.265%
- $5B at 4.270% (only $3B needed from this yield)
- Stop-out yield: 4.270%
- Bid-to-cover ratio: ($15+12+10+8+5+2)B / $42B = 1.24x

A bid-to-cover ratio of 1.24x means there was $1.24 in demand for every $1 of bonds offered. Not super exciting, a strong auction is usually 2.5x+. A weak auction makes bond traders nervous and headline writers happy.

Yield to Maturity (YTM)¶

Yield to Maturity is the total return anticipated on a bond if held until it matures. It is the discount rate that equates the present value of all future cash flows (coupons + principal) to the current market price.

Formula:
Price = C/(1+y) + C/(1+y)^2 + ... + C/(1+y)^n + F/(1+y)^n

Where: C = coupon payment, y = YTM (per period), n = number of periods, F = face value.

Example:
- 5-year T-Note, face value $1,000, coupon rate 4.00% (semi-annual), current price $980
- Semi-annual coupon: $1,000 x 4.00% / 2 = $20
- Number of periods: 5 x 2 = 10
- YTM (solved iteratively) is approximately 4.45% annualized

The YTM is higher than the coupon rate because the bond is purchased at a discount ($980 < $1,000). You’re getting the coupons plus a little bonus when it matures at $1,000.

Market Participants¶

Buy-Side vs. Sell-Side¶

In simple terms: buy-side has the money, sell-side has the execution. It’s like the difference between being the person ordering food (buy-side) and the waiter bringing it to you (sell-side). Except the waiter makes money on every trip.

Market Makers¶

Market makers are firms (typically banks or specialized trading firms) that continuously provide buy and sell prices for financial instruments, ensuring there is always liquidity available. They profit from the bid-ask spread.

Example: A market maker in EUR/USD might quote:
- Bid: 1.08480 (willing to buy EUR at this price)
- Ask: 1.08485 (willing to sell EUR at this price)
- Spread: 0.5 pips

They earn $5 per standard lot on each “round trip” (buying at bid, selling at ask). With millions of transactions, this adds up. It’s the financial version of “a penny saved is a penny earned”, except it’s $5 per trade, millions of times a day.

Central Banks¶

Central banks (Federal Reserve, ECB, Bank of Japan, etc.) are unique market participants because they can:
- Set benchmark interest rates (monetary policy)
- Buy/sell government bonds (quantitative easing/tightening)
- Intervene in FX markets to stabilize their currency
- Act as lender of last resort to commercial banks

Central banks are the referees of financial markets. Except these referees can also change the rules mid-game, print new game pieces, and buy the entire stadium if they want to.

How a Trade Flows: Front Office to Back Office¶

When a trade is executed, it passes through three distinct areas of the organization. Understanding this flow is crucial whether you’re a trader, a developer, or a risk analyst.

Front Office (Revenue-Generating)¶

• Sales: Client-facing. Discusses trade ideas with clients, receives orders.
• Trading: Executes trades, manages risk, makes markets. Traders sit on specific desks (rates desk, FX desk, credit desk).
• Structuring: Designs bespoke derivatives products for clients.

Example flow:
1. A corporate treasurer at Airbus calls the sales desk at Deutsche Bank to hedge EUR/USD exposure
2. Sales relays the request to the FX trading desk
3. The trader quotes a price for a 6-month EUR/USD forward contract
4. The client accepts, and the trade is executed

The front office makes the money. The back office makes sure nobody goes to jail. The middle office makes sure neither of the other two are lying about the numbers.

Middle Office (Risk and Control)¶

• Risk Management: Monitors the firm’s exposure across all desks. Calculates Value at Risk (VaR), stress tests, scenario analysis.
• Product Control (P&L): Independently verifies the daily profit and loss reported by the front office.
• Compliance: Ensures all trades comply with regulations (Dodd-Frank, MiFID II, EMIR).

Back Office (Operations and Settlement)¶

• Trade Confirmation: Sends and matches trade details with the counterparty.
• Settlement: Ensures the actual exchange of cash and securities occurs on the settlement date.
• Reconciliation: Matches internal records with external records (custodians, clearing houses, counterparties).
• Reporting: Generates regulatory reports (trade reporting, position reporting).

Client Order
     |
     v
[FRONT OFFICE]  Sales -> Trading -> Execution
     |
     v
[MIDDLE OFFICE]  Risk Check -> P&L Verification -> Compliance
     |
     v
[BACK OFFICE]   Confirmation -> Settlement -> Reconciliation -> Reporting

Key Insight: A well-functioning back office is invisible; a poorly functioning one can bring down a firm. The collapse of Barings Bank in 1995 was partly due to weak back-office controls that failed to detect Nick Leeson’s unauthorized trading. He lost $1.4 billion. The bank that had survived the Napoleonic Wars didn’t survive one rogue trader.

Summary Comparison Table¶

Conclusion¶

Financial markets are a rich ecosystem of interconnected asset classes, each serving distinct purposes for different participants. Interest rates form the foundation upon which all other assets are priced. Rate derivatives let you manage and transfer interest rate risk. The foreign exchange market enables global trade and investment. Repo markets provide the liquidity and funding that keeps the financial system running. Government bonds offer the safest store of value and serve as benchmarks for all other fixed-income instruments.

Each asset class has its own conventions, risks, and quirks, but they all share one fundamental principle: connecting those who have capital with those who need it.

And if you’ve made it this far, congratulations, you now know more about financial markets than 95% of people who say “I’m into finance” at dinner parties. Use this power wisely.