Mistake 1: Misallocating Study Time Across Topics
Over-Engineering Low-Weightage Concepts
One of the most frequent CFA Level 1 errors is the tendency to get bogged down in granular, mathematically complex topics that represent only a small fraction of the total points. Candidates often spend weeks attempting to master the intricacies of Black-Scholes-Merton option pricing or the structural nuances of collateralized mortgage obligations in the Derivatives and Fixed Income sections. While intellectually stimulating, these topics might only yield a handful of questions. The CFA Institute provides specific weightings for each topic area, and ignoring these is a recipe for failure. Spending 20% of your study time on a topic that carries a 5% weight creates a massive opportunity cost, leaving you vulnerable in sections that carry far more weight.
Under-Practicing High-Weightage Foundations
Conversely, candidates frequently underestimate the depth required for high-weightage sections like Financial Statement Analysis (FSA). FSA is the bedrock of the Level I exam, often carrying a weight of 13–17%. It is not enough to simply know the difference between IFRS and US GAAP; you must understand the mechanics of how specific accounting choices, such as LIFO versus FIFO inventory valuation, ripple through the financial statements to affect ratios like the Interest Coverage Ratio or the Debt-to-Equity ratio. Failing to drill these foundational concepts extensively means you are leaving the easiest points on the table. Mastery here provides a safety net for the more volatile sections of the exam.
Skipping Ethics Until the Last Minute
Treating the Ethical and Professional Standards section as an afterthought is a primary reason for failing CFA Level 1 reasons. Many candidates assume that common sense will carry them through, only to find that the exam tests specific applications of the Code of Ethics and Standards of Professional Conduct. Ethics carries a significant weight (15–20%) and acts as a "tie-breaker" in the grading process; if your total score is on the borderline of the Minimum Passing Score (MPS), a strong performance in Ethics can push you into the passing category. You must study the nuances of Soft Dollar Standards and GIPS compliance early and revisit them frequently to internalize the specific language used by the Institute.
Mistake 2: Misreading Questions and Answer Choices
Overlooking Critical 'NOT' and 'LEAST Likely' Phrases
Among the most avoidable CFA exam mistakes is the failure to identify the "direction" of the question. The exam frequently uses negative stems, asking which statement is "LEAST likely" to be true or which action is "NOT" a violation of the Standards. Under the pressure of the 90-second-per-question clock, the brain naturally looks for the first correct statement it sees. If you miss the word "LEAST," you will likely select choice A because it is a true statement, even though the question is asking for the one false statement. This is a classic CFA candidate pitfall that can be corrected by mentally underlining the negative qualifier before looking at the options.
Failing to Read All Four Answer Choices
In the current 3-option multiple-choice format, candidates often stop reading as soon as they find an answer that seems plausible. This is dangerous because the exam is designed with distractors—answers that are correct under a common miscalculation or a partial understanding of the concept. For example, a question might ask for the Internal Rate of Return (IRR) but provide the Net Present Value (NPV) as option A. If you calculate the NPV first and see it listed, you might click it and move on without realizing the question asked for the IRR. Reading every choice ensures you don't fall for a value that was placed there specifically to catch those who rush.
Succumbing to Familiar-Looking Distractors
CFA exam questions are expertly crafted to include terms that look familiar but are used in a technically incorrect context. A distractor might use a term from the Global Investment Performance Standards (GIPS) in a question about portfolio management, hoping your brain will recognize the term and associate it with correctness. This is why rote memorization fails. You must understand the specific definitions and applications. If a term looks right but doesn't fit the logic of the question's specific scenario, it is likely a trap designed to filter out candidates who have only a superficial familiarity with the glossary.
Mistake 3: Poor Time Management During the Exam
Getting Stuck on Early Difficult Questions
The Level I exam is a marathon of 180 questions split into two sessions. A common tactical error is the "sunk cost" fallacy: spending five minutes on a single difficult Quantitative Methods problem because you feel you've already invested too much time to give up. Every question carries the same weight. Spending five minutes to get one point at the expense of three easier questions later in the booklet is a mathematical losing strategy. If you cannot solve a problem within the first 60 seconds, you must make an educated guess, flag the question for review, and move on immediately to maintain momentum.
Not Having a Per-Question Time Budget
Successful candidates operate with a strict time budget of approximately 90 seconds per question. This average allows for quicker wins on Ethics and conceptual questions to buy time for complex FSA or Fixed Income calculations. Without this internal clock, you may find yourself with 20 questions remaining and only 10 minutes on the timer. This leads to blind guessing, which significantly lowers your probability of success. Use the digital clock on the computer-based testing (CBT) interface to check your progress every 30 minutes; you should have completed roughly 20 questions in that window.
Inadequate Time for Review and Marked Questions
A critical component of the what not to do CFA exam list is failing to leave a buffer at the end of each session. Ideally, you should finish with 15–20 minutes to spare. This time is not for second-guessing yourself, but for returning to the questions you flagged. Often, a concept mentioned in question 70 might trigger a memory that helps you solve question 15. Furthermore, this buffer allows you to ensure no questions were left blank. Since there is no penalty for an incorrect guess, leaving a question unanswered is an unforced error that provides a 0% chance of scoring, whereas a guess provides at least a 33% chance.
Mistake 4: Inefficient Use of the Approved Calculator
Not Mastering Key Functions Before Exam Day
The Texas Instruments BA II Plus or the HP 12C are the only tools allowed, and their mastery is non-negotiable. Candidates often lose time because they haven't memorized the keystrokes for the Time Value of Money (TVM) buttons or the Cash Flow (CF) worksheet. If you are manually calculating the present value of a bond with semi-annual coupons instead of using the [N], [I/Y], [PMT], and [FV] keys, you are wasting minutes and increasing the risk of a manual entry error. You should be able to execute an NPV or IRR calculation with muscle memory alone, allowing your cognitive energy to be spent on interpreting the question rather than operating the device.
Forgetting to Clear Previous Entries
A subtle but devastating error is failing to clear the calculator's memory between problems. On the TI BA II Plus, the [2nd] [CLR TVM] command is essential. If you leave a residual value in the [FV] register from a previous problem, it will be used in your current calculation, leading to an incorrect result that—cruelly—might match one of the distractor choices. This is a primary source of "phantom errors" where a candidate feels they followed the right process but still arrived at the wrong answer. Developing the habit of clearing all registers before every new problem is a fundamental exam-room discipline.
Wasting Time on Manual Calculations
Many Level I questions can be solved through logic or calculator functions, yet candidates often resort to manual algebra. For instance, when calculating the Standard Deviation of a portfolio or the weighted average cost of capital (WACC), using the data and statistics functions on the calculator is significantly faster and more accurate than writing out the formula. The exam tests your ability to reach the correct financial conclusion, not your ability to perform long-form arithmetic. If you find yourself doing extensive scratchpad work for a single-point question, you are likely ignoring a more efficient calculator-based or conceptual shortcut.
Mistake 5: Relying Solely on Memorization Over Understanding
Cramming Formulas Without Context
Level I involves hundreds of formulas, from the Capital Asset Pricing Model (CAPM) to the DuPont Analysis decomposition. Many candidates try to memorize these as isolated strings of variables. However, the exam often tests the relationship between variables rather than simple plug-and-chug calculation. For example, instead of asking for the result of a formula, a question might ask how an increase in financial leverage affects the Return on Equity (ROE). If you only memorized the formula but don't understand the underlying mechanism of leverage, you will struggle when the question is presented conceptually rather than numerically.
Inability to Apply Concepts to Novel Scenarios
The CFA Institute is adept at presenting familiar concepts in unfamiliar contexts. You might understand the Price-to-Earnings (P/E) ratio in the context of equity valuation, but can you apply it to a cross-sectional analysis of companies with different accounting treatments for depreciation? Candidates who rely on memorization often freeze when a question doesn't look exactly like the ones in their practice bank. True preparation involves asking "Why?" during your study sessions. Why does an increase in the discount rate decrease the present value? Why does a lease capitalization affect the debt-to-equity ratio? Understanding the "why" allows you to pivot when the exam presents a unique scenario.
Confusion Between Similar-Sounding Terms
The curriculum is filled with terms that sound similar but have distinct meanings, such as Modified Duration versus Effective Duration, or Expansionary Monetary Policy versus Accommodative Policy. A common pitfall is using these terms interchangeably during study, leading to confusion during the exam. For example, using Modified Duration to measure the price sensitivity of a bond with an embedded option is a fundamental error, as only Effective Duration accounts for changes in cash flows due to the option. Precision in terminology is a hallmark of a successful candidate; you must distinguish between these concepts to avoid the traps set in the answer choices.
Mistake 6: Neglecting Mock Exams and Simulated Conditions
Underestimating Mental Stamina for 4.5 Hours
The CFA Level I exam is as much a test of endurance as it is of knowledge. Total testing time is approximately 4.5 hours, split into two 2.25-hour sessions. Many candidates only practice in short bursts of 20 or 30 questions. On exam day, they hit a "mental wall" halfway through the second session, leading to simple errors in the final sections like Derivatives and Portfolio Management. To avoid this, you must perform at least three full-length mock exams in a single sitting, mimicking the actual schedule. This builds the "mental callous" needed to maintain focus when fatigue sets in during the final hour.
Not Practicing with the Computer-Based Interface
Since the transition to Computer-Based Testing (CBT), the way candidates interact with the exam has changed. You can no longer circle keywords on a paper booklet or easily flip back and forth between 50 pages. Failing to practice with a digital interface that includes flagging functions and a digital strike-through for eliminated answers can lead to technical fumbling on exam day. Familiarizing yourself with the Prometric or British Council testing software environment—specifically how to use the digital scratchpad and the navigation pane—is essential for a seamless experience that doesn't sap your limited time.
Failing to Analyze Mock Exam Results
Taking a mock exam and only looking at the final score is a wasted opportunity. The value of a mock lies in the gap analysis. You must categorize every wrong answer: Was it a lack of knowledge, a misreading of the question, or a calculation error? If you find that 40% of your errors are due to misreading "LEAST likely," you have a process problem, not a knowledge problem. If you consistently miss questions on Deferred Tax Assets, you have a conceptual gap. Without this rigorous post-game analysis, you are likely to repeat the same mistakes on the actual exam, regardless of how many practice questions you complete.
Mistake 7: Letting Anxiety Dictate Exam Strategy
Second-Guessing Initial Answers Excessively
Psychological studies and exam statistics often show that a candidate's first instinct is usually correct, provided they have prepared adequately. A common mistake is using the final 15 minutes of a session to change answers. Unless you have discovered a clear, objective error (like a calculator typo or a misread "NOT"), you should refrain from changing your answer based on a "feeling." Anxiety often manifests as a doubt that the question was "too easy," leading candidates to over-complicate their logic and switch from a correct, straightforward answer to a complex, incorrect one.
Panicking After a Difficult First Session
The Level I exam is structured such that some candidates will find the morning session significantly harder than the afternoon session, or vice versa, depending on their personal strengths. A frequent reason for failure is "mental folding" after a tough first session. Candidates who feel they performed poorly in the first 90 questions may lose motivation for the second half. However, the Minimum Passing Score is based on the total aggregate performance. A stellar second session can easily compensate for a mediocre first session. Maintaining a professional, resilient mindset throughout the entire day is critical for survival.
Changing Correct Answers to Wrong Ones
This specific form of second-guessing often happens when candidates try to "balance" their answer distribution. If they notice they have selected choice 'B' four times in a row, they may change the fifth answer to 'A' or 'C' out of a false belief that the answers must be evenly distributed. The CFA Institute does not follow a predictable pattern of answer distribution. Each question is independent. If your calculations and logic consistently lead to 'B', trust the process. Changing an answer for any reason other than a found logical error is a gamble that rarely pays off and often leads to the narrow margin between a pass and a fail.