Peter Lynch Warned About the Mistake Investors Make After a Week Like This One

Peter Lynch’s warning for a Monday like this one is 31 years old: “Far more money has been lost by investors preparing for corrections or trying to anticipate corrections than has been lost in corrections themselves.” He wrote it in Worth magazine in September 1995, five years after he stepped down from running Fidelity’s Magellan Fund, in an essay titled Fear of Crashing. His closing line was shorter: “What matters is that you stay invested in stocks.”

So what should a retired couple do with their retirement savings this week? Take a couple, 67 and 64, with $2.4 million: $1,700,000 in a rollover IRA, $500,000 in a brokerage account and $200,000 in a Roth, held 60% in an S&P 500 index fund ($1,440,000) and 40% in bonds and cash ($960,000, with $200,000 of it in a money market fund). Social Security pays them $5,100 a month, $61,200 a year, and they spend $126,000, so they draw $64,800 a year from savings, 2.7% of the total. If that sounds like you, the numbers below are yours, and there are three moves to make in your retirement plan this week. None of them is a sale of stock.

The week ahead is the kind he was writing about, and for a retiree’s money it has three dates on it. Monday’s open comes after the S&P 500 finished Friday 5.6% below its October 6 record, with a 4.4% drop on Thursday and its worst week since April. Tuesday at 8:30 AM brings the October inflation report, with September’s reading at 3.7%, and it will move the odds of a Fed rate increase on December 9, which stand at about 80%. Put together, the calendar reads as a setup for the correction Wall Street has spent a week warning about; it is also an ordinary week of scheduled data, and nobody, Lynch included, knows which it will turn out to be.

What last week cost, and what preparing would cost

Your stock side was worth $1,525,778 at the October 6 record and $1,440,000 on Friday: $85,778 gone in a month, $40,010 of it last week. The urge is to sell some before Tuesday’s number and buy it back when the dust settles. Lynch’s answer was a test. He put $2,000 a year into the S&P 500 from 1965 on and found that buying on January 1 every year returned 11% a year, buying at each year’s peak 10.6%, and buying at each year’s low 11.7%. Here is the same test on the S&P 500 fund since 2000, a stretch with three crashes in it, valued at Friday’s close and counting price only.

The whole gap between the unluckiest buyer and the perfect one over 26 years is 1.5 points a year, or $65,580 on $52,000 invested. Trying to be the perfect one is where the money goes missing, because the only way to buy at the low is to be out of the market, and nobody rings a bell.

The record since 1999 says the same about weeks like this one. The S&P 500 fund has fallen 5% or more from a record close 22 times before this one. Fourteen of those stopped before the fall reached a tenth, eight went on to a tenth, five to a fifth, and the median wait from the 5% line back to a new record was 2 months. The longest was 86 months, from 2000; since 2013 the longest has been 24 months, from 2022.

Move one, Monday: count the years, not the points

The first move is a check, made before the open. Your $960,000 of bonds and cash covers 14.8 years of the $64,800 you draw each year, and the money market alone covers 3.1 years. The longest wait back to a record in the last 27 years, 86 months, would have needed $462,122 of draws; you have twice that outside stocks. A 2022-size fall of 25.4% takes $365,760 off the stock side and leaves $2,034,240 in total; a 2007-size fall of 56.5% takes $813,600 and leaves $1,586,400. Either way the year’s spending comes out of the money market, and you sell no shares into the fall.

Move two, Tuesday: put the Fed question where it belongs

The inflation number decides whether the Fed raises rates on December 9, and a rate increase changes one thing in this plan: the yield on your cash. The $200,000 money market earns the 3-month bill’s 4.17%, or $8,340 a year, and a quarter-point increase adds about $500. It changes nothing about what the stock side is for or when you need it.

The move is to take the question off the table for a decade. Put $100,000 of the IRA’s bond money into a 2-year Treasury at 4.46%, $100,000 into a 5-year at 4.59% and $100,000 into a 10-year at 4.84%. That is $13,890 a year, locked whatever the Fed does. The remaining $460,000 of bonds at the 5-year’s 4.59% pays $21,114, so your bonds and cash together bring in $43,344 a year. With Social Security that is $104,544, or 83% of your $126,000 of spending, before you sell a share; the stock fund’s dividends, $14,850 at its 1.03% yield, take it to 95%. A Treasury held to maturity pays what it said on the day you bought it. A bond fund can fall, as 2022 showed.

Move three, any day this week: the conversion the drop made cheaper

The one thing a lower price is good for is moving money from the IRA to the Roth, because the tax is charged on the dollars moved and the dollars are 5.6% smaller than a month ago. The question is how much you can convert in 2026 without crossing a line that costs you later.

Your $64,800 of IRA withdrawals plus $11,434 of interest and dividends in the brokerage account put provisional income at $106,834, so 85% of your Social Security, $52,020, is taxable, and adjusted gross income is $128,254. The joint standard deduction is $32,200, plus $1,650 for the spouse who is 65 or older, plus the new $6,000 senior deduction for him, so taxable income is $88,404 and the federal bill is $10,112.

The line that matters is Medicare’s. A joint return above $218,000 of modified adjusted gross income sets a Part B surcharge two years later, so the 2026 return decides 2028 premiums, when both of you will be on Medicare. You have $89,746 of room under it. Convert $89,000 and adjusted gross income lands at $217,254. The senior deduction shrinks to $1,965, because it loses 6 cents for every dollar of income above $150,000, taxable income rises to $181,439 and the federal bill to $29,341. The conversion costs $19,228, or 21.6% of what moved. Convert $90,000 instead and you cross the line by $254, which costs $974 per person in 2028 premiums. At Friday’s price $89,000 moves 121 fund shares out of the IRA; the same shares would have cost $94,302 at the October record, so the drop saved $1,166 of tax. The IRA ends the year at $1,611,000 and the Roth at $289,000, and every dollar moved is a dollar the IRS cannot force out as a required minimum distribution when he turns 73.

Where the rule is weak

Lynch’s test counts price only, and so does ours; dividends would raise every row and narrow nothing. His rule assumes you can wait, and the couple can, with 14.8 years of draws outside stocks. A reader with two years of cash and 90% in stocks has an allocation problem, and this week is the wrong reason to fix it. “Stay invested” means the stock side you chose on October 6, when nothing was wrong. If 60/40 was right then, it is right now. If it was too much, fix it once, inside the IRA where a sale costs nothing in tax, and then leave it alone.

The bottom line

The S&P 500 opens Monday 5.6% below its record with an inflation report Tuesday and a Fed increase about 80% priced for December. Peter Lynch’s warning was that investors lose more preparing for corrections than in corrections, and his test, run on the last 26 years, puts the gap between perfect and worst timing at 1.5 points a year. For a couple with $2.4 million the three moves are a check that $960,000 outside stocks covers 14.8 years of draws, a $300,000 Treasury ladder that locks in $13,890 a year, and an $89,000 Roth conversion kept $746 under Medicare’s $218,000 line. The stock side of the retirement plan stays where it was.

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