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BOBOO REPORT · #17 Savings and mobilization

The Value of Savings

Reading markets as we view a forest from the sky
Investor flows Pension funds Treasury shares
The Value of Savings — Sep 2, 2026 (Wed) 21:30 · Seoul
① Mobilization gauge
+KRW 127.0 trillion (retail 102.0 · other corporations 25.0) · 76% of foreign selling
② Pension overhang
Net selling KRW 8.9 trillion (cumulative · KOSPI 8.5) · allocation 29.1% vs target 20.8% (end-June)
③ Leverage intensity
0.852 (09/01) · −13% vs 7/28's 0.98
④ Share-cancellation decisions
2026: 420 decisions · monthly average 46.7 = 2.8x 2024
⑤ Won–memory co-movement
Joint strength · unit price +6.4%MoM / won −4.6%20d
⑥ Real−BEI divergence
Real 30y +6bp / BEI +3bp (5 days)
⑦ ERP + cracks
−1.39pp · B200/H100 2.24 · Chinese providers 54.7% · cracks 08/31
⑧ Yen switch
US–Japan gap 180bp · L2 −$443bn · condition unmet
This report's gauges (§06) — live widgets update with new observations after publication · Trigger 1 Watch 3 Wait 4 · Each needle has its own date
A market near closing time. A merchant puts goods from his own stall into his own basket, while residents queue with piggy banks. Boboo's hot-air balloon in the sunset sky.

Foreigners sold KRW 165 trillion in Korean stocks this year. Yet the index rose. The other side of #16's unanswered question is now clear: who bought those shares. Of the buying side, 61% was retail investors and 15% was the companies themselves (share buybacks). The national pension fund was selling on the other side, driven by a formula rather than intent. In an era of managed prices, savings are the last buyer. The value of savings becomes the value of a country's stock market.

01

The Buying Hands

The other side of KRW 166.6 trillion in foreign net selling — every investor category (1,300-day backfill since 2024-01 · accounting-identity error: KRW 700 million)
retail investors
KRW 102.0 trillion
Net buying — 61% of the buying side
KRW 109.5 trillion in KOSPI alone — see the footnote in §05
Other corporations
KRW 25.0 trillion
Net buying — the companies themselves
The category recording direct share buybacks (classification confirmed)
Institutions
KRW 39.6 trillion
Effectively intermediaries
Financial investment firms: KRW 72.7 trillion (program trading/ETF LPs) —all directional institutions were net sellers
Pension funds etc.
KRW 8.9 trillion
Net selling — against the flow, §02
Insurers net sold KRW 7.8 trillion and investment trusts KRW 12.5 trillion too. The professionals sold
Who Bought Foreigners' KRW 166.6 Trillion? — 2026 Cumulative Net Buying (KRW tn)
KOSPI + KOSDAQ · As of 9/2 · Right = net buying; left = net selling · All participants sum to ≈0 (accounting identity): these four baskets cover everyone
The old rule of a market downturn was that institutions bought what foreigners sold. This time, directional institutions—investment trusts, insurers and pension funds—sold together. The buyers were retail investors and the companies themselves. This is observed mobilization: savings entered the market directly, bypassing institutions.
02

Pensions Move Against the Flow

Households buy while pensions sell — driven by a formula rather than intent

Pension funds have net sold KRW 8.9 trillion this year (consistent with reported January–August net selling of KRW 8.8 trillion: cross-validation). It looks like Value-up (Korea's corporate value-up program) and its second paradox: the state calls money into stocks, while its pension fund leaves. But the mechanism is a formula. The NPS's target domestic-equity allocation was actually raised this year, from 14.9 to 20.8%. The problem is that the index rose faster. The actual allocation reached 29.1% (officially reported at end-June), leaving about KRW 160 trillion of excess holdings. Rebalancing rules now require selling.

Above Retail Buying — KRW 51–57 Trillion of Overhang

Even using the full permitted range (SAA ±6pp), KRW 51–57 trillion in potential sales remain, according to brokerage estimates★. The mechanism is simple: The higher the index rises, the more pension funds must sell. A managed target-allocation formula becomes an automatic selling mechanism in a rising market. This overhang above KRW 102.0 trillion in retail net buying is one vulnerability in §05. ("Pension funds etc." is a KRX category, not the NPS alone. Its definition differs from the fund's own disclosures; see the footnote.)

03

Mobilization in Two Countries — Real Buying and an Illusion

Korean households' allocation: +8.4pp over 6 quarters vs Japan +4.2pp — but the contents differ
Equities and Funds as a Share of Household Financial Assets — Korea vs Japan (%)
Korea: Bank of Korea flow of funds (equity securities and investment funds) · Japan: BOJ flow of funds (stocks + investment trusts) · Same period: 2024Q4–2026Q1
Korea 20.4 →28.8% · Japan 19.4 → 23.6% —Korea's slope is exactly twice as steep. The more important difference is not the slope, but the ingredients.
Inside Japan's 2026Q1 — Where Did the Balance Increase Come From? (JPY tn)
BOJ flow of funds, 3-table decomposition: Δbalance = transaction flows + valuation adjustments (exact accounting identity)
Japanese household stock holdings rose +JPY 9.75 trillion, but transactions were net selling of JPY 0.86 trillion. All the increase came from valuation gains. Japanese households were not buying; their holdings were"rising in value". Since the new NISA began (2024-01), cumulative public equity-fund flows were JPY 3.77 trillion domestically versus JPY 20.1 trillion overseas: a domestic share of 15.8%. The destination was overseas. Korea's +8.4pp, by contrast, was backed by actual buying (net buying of KRW 102.0 trillion). Korea is where the real mobilization occurred.
04

The Last Buyer

Who supports Japan's rally — and the one buying hand common to both countries
Japan's Actual Buyers — JPX Weekly Net Buying by Business Corporations (JPY 100m)
2026-07-21 to 08-21 · 5 consecutive weeks of net buying · Only 5 weeks of data (no free backfill; accumulating from here). Do not generalize prematurely
Over the same 5 weeks, foreigners sold in 3 and retail investors in 4. The buyers supporting the index's record highs were business corporations — share buybacks. They occupy the same place as Korea's KRW 25.0 trillion in other-corporation net buying. Only companies buying their own shares are common to both countries.
★Update (9/2 close) — Two observed days
On 9/1, KOSPI retail investors (net selling KRW 539.8 billion), foreigners (KRW 491.9 billion) and institutions (KRW 634.0 billion) all sold. Other corporations alone absorbed KRW 1.6657 trillion in net buying. The four categories sum to 0; the index reversed from −1.28% intraday to +0.23%. During the −3.99% sell-off on 9/2, other corporations again recorded net buying of KRW 1.6505 trillion. Together with retail investors (net buying KRW 2.3028 trillion), they absorbed KRW 4 trillion sold by foreigners and institutions. Other corporations record direct buybacks but also ordinary corporate trading. Until broken down by stock, we can say only that the flows fit.

This joins #16 and #17. The Commercial Act ordered cancellation (#16), and P/B reform pressed shareholder returns. In both Korea and Japan, the last buyer created by the rules was the company itself. Price governance (institutional instructions) and mobilized savings (households entering) meet at share buybacks. In an era of managed prices, the last buyer is the company itself, instructed to raise its value.

The Extreme Case Is Still Unfolding — SK D&D and Samsung (#16 Follow-up)
The endpoint of buybacks is a company buying and closing its own market. Two live cases in brief: three SK D&D rows (rights offering, price, exit) and one Samsung row
CaseDetails
SK D&D — A rights offering cleared by lowering its priceIt answered the correction request (8/5) with a lower price: stage 1 issue price, 3,060 →KRW 2.26 thousand (18% of the KRW 12,750 tender price). The 44.68 million new shares (240% of existing shares) stayed unchanged; proceeds fell from KRW 136.7 billion to KRW 100.9 billion. The collapse cut the controlling shareholder's allocation cost (KRW 80.1 billion) by 26%. Effective 8/28 → ex-rights 9/1 (reference price 2,810) → rights certificates list 9/21 → final issue price 10/6 (lower of stage 1 and stage 2) → subscription 10/12 → payment 10/15 → new shares list 10/28. Shinsegae Food answered 2 correction orders with a higher price (appraisal rights exercised for 580,111 shares; 55.66% of minority shareholders exited for cash). SK D&D lowered its price and cleared: the same tool, opposite responses. Once effective, authorities have only Article 131, premised on false statements
SK D&D — Two days of illusion; price closes the door9/1 upper limit 3,650 → 9/2 4,220 (+15.6%, surrendering the intraday upper limit; volume 6.24 million shares = 1.6x the 3.84 million-share free float). Up +50% in two days from the reference price. Subtract the cash raised from fully diluted market capitalization, and the existing business is valued at 2.2x its value three days earlier, without new information. That price does two things. If unallocated shares are not issued and the market price exceeds the issue price, minorities subscribe. If they subscribe, the controlling shareholder's stake (79.36%) does not rise. The rebound is fuel for the rights offering and a brake on ownership concentration. New buyers without rights pay that price. An 8/31 holder exits with old shares at 4,220 + 2.4 rights certificates at 4,704 =8,924 (70% of the tender price they rejected). With neither certificates (9/21) nor stock borrowing, the half-market has no tool to lower the price. It continues until certificates list on 9/21 and new shares on 10/28 (9.22 million shares costing 2,260)
SK D&D — Price, not ownership, is the barrierThe delisting threshold is not 95%. A comprehensive share exchange needs only a shareholders' special resolution (2/3 of votes present and 1/3 of shares outstanding), and the consideration can be cash. LocknLock, Connectwave, Ecomarketing and Viol exited through this door; Hahn & Company had the votes before its tender offer. The barrier was the pricing rule, which is changing. The Capital Markets Act amendment passed by the National Assembly on 8/20 replaces market prices in affiliate mergers, share exchanges and appraisal claims with fair value (combining market, asset and earnings values). Effective 3 months after promulgation, applying to board resolutions after that date★. Including asset value for low-P/B companies can put exchange prices well above market prices. The period from 10/28 until implementation is therefore the last window under market-price rules. Disclosures will reveal intent: controlling-shareholder certificate sales on 9/21–28, subscription results on 10/12–13 and board resolutions within that window. The filing says the largest shareholder plans to subscribe for its entire allocation (without stating the funding method). Selling certificates would conflict with that statement
Samsung — Nine decimal places, and two days of buyersOn 8/21, Samsung Electronics disclosed KRW 90–110 trillion of shareholder returns. The original specifies only KRW 30 trillion entirely in cash dividends in Q3; the end-October/end-January boards will decide cancellation amounts. The same day's KRW 15 trillion buyback is for compensation and will not be canceled; acquisition ends on 11/21. The market read the arithmetic, not the announcement. Cancellation raises remaining shareholders' ownership percentages. Samsung Life and Samsung Fire's combined stake in Samsung Electronics was 9.999999986% ★ (reported), close to the 10% financial-industry ownership limit. Cancellation → higher ownership → limit → selling already played out in March's KRW 1.4–1.5 trillion block deal ("preemptive response to the financial-industry law"). On 8/24, Electronics −8.70% (257,000) and Life −13.09% fit that configuration (#16).
From #17, another piece appears. In KOSPI's 9/1 and 9/2 sell-offs, other corporations alone absorbed KRW 1.6657 trillion and KRW 1.6505 trillion, respectively: the category recording direct buybacks (only a consistent configuration until stock-level decomposition). Even as the instructed buyer bought, Samsung Electronics on 9/2 was 250,500 (−4.02%), 11% below the 8/21 close of 281,500. The end-October board will set the first cancellation increment, which sets Life and Fire's next sales. There is no basis to say the returns were designed around the limit. We can say only that two laws squeeze the same company from opposite sides
05

The Buyer's Vulnerabilities — Korea

Measuring a market supported by retail investors: three separate axes. Combining them hides which one moved
Three Axes of Mania — Compared With the 7/28 Crash (as of 9/1)
AxisCurrentOn 7/28Reading
Leverage intensity0.8520.98Rebuilding — still below
Semiconductor concentration42.5%60.8% (trading-value peak)Eased, but still high
Retail concentrationJuly net buying KRW 5.0 trillion → August KRW 5.4 trillion—Similar level persists
Margin loans KRW 33.43 trillion · deposits KRW 98.17 trillion · loans/deposits 34.1% (9/1)
Two more vulnerabilities — overhang and an abandoned market

First, Pension overhang (§02): a selling instruction that grows as the index rises hangs above retail buying. Second, concentration by market. Retail net buying of KRW 102.0 trillion is a KOSPI story (KRW 109.5 trillion). In KOSDAQ, retail investors were net sellers of KRW 7.6 trillion, while foreigners net bought KRW 4.1 trillion. The flow pattern is reversed. Mobilization was KOSPI's mass migration into semiconductors. The map of buying hands is really a KOSPI map. Mania is the vulnerability in a retail-supported market. The three axes above form its gauge panel, measuring rather than forecasting.

06

Gauges — v7

Eight needles — trigger 1 · watch 3 · wait 4 · Korea 5 + US/Japan 3

This table is the gauge panel above the title. Like #13–#16, it is a live widget that updates with new observations after publication. Publication values remain in this table. The first five slots are Korea: mobilization gauge, pension overhang, leverage intensity, cancellation decisions and won–memory co-movement. The last three track savings crossing borders: real−BEI, ERP + cracks, and the Yen switch (a new needle showing the L2 sign alongside the US–Japan gap). Cumulative foreign flows were absorbed into ①, and the bill share lost its place among the three US slots. These needles were removed for this edition, not retired across all reports. The #15 and #16 gauge panels keep updating those needles live.

#needleNow (at publication)How to read it · If it moves
①Mobilization gauge+KRW 127.0 trillion (retail 102.0 · other corporations 25.0) · 76% of foreign selling [Trigger · 09.02]Retail investors + other corporations' cumulative 2026 buying:≥KRW 50 trillion AND absorbing ≥50% of foreign net selling → trigger; ≥KRW 20 trillion → watch. ★'"Absorbed"' means only a a consistent alignment. These data cannot establish persistence or intent. KRW execution basis cannot be compared with the balance of payments; ETF channels cannot be separated (source limitation). Other corporations include ordinary corporate trading, not only share buybacks.
②Pension overhangNet selling KRW 8.9 trillion (cumulative · KOSPI 8.5) · allocation 29.1% vs target 20.8% (end-June) [Watch · 09.02]Pension funds etc.' cumulative 2026 net selling:≥KRW 15 trillion → trigger; ≥KRW 5 trillion → watch. ★'Pension funds etc.' includes mutual-aid associations and other pensions, not the NPS alone. It differs from the reported'"NPS −KRW 8.8 trillion"'. Close readings provide cross-validation, not an identical series. Rebalancing overhang is KOSPI only (effectively 0 in KOSDAQ). The allocation is officially reported by the fund (29.1% as of 2026-06-30); the 20.8% target was approved by the fund committee on 5/28. Parentheses on the value line give the As of, or'(reported)' if the source is unconfirmed. The reported'~30%' estimates the later index surge and has no reference date. Only observed cumulative pension-fund flows determine the state; the monthly, low-frequency allocation does not change its color.
③Leverage intensity0.852 (09/01) · −13% vs 7/28's 0.98 [Wait · 09.01]KOSDAQ margin loans ÷ (index/100). A return to 0.98 (7/28 sell-off) plus a credit-driven increase → trigger; ≥0.88 (2019 trade-dispute low: 0.878) → watch. A falling index alone raises intensity, so Δ decomposition (credit/index contributions) filters that illusion. The standard denominator is market capitalization; without that series, index/100p substitutes. The conclusion that leverage is 'light' is therefore conservative. Credit is published a day later than the index, so their as-of dates differ. No composite mania score: crowding and concentration appear separately in the body table.
④Cancellation decisions2026: 420 decisions · monthly average 46.7 = 2.8x 2024 [Watch · 09]Versus the base year's monthly average:≥3x → trigger; ≥2x → watch. Decision disclosures lag execution (acquisition usually takes 3 months). A 'decision this month' does not mean 'buying this month'. Counts only, not amounts.
⑤Won–memory co-movementJoint strength · unit price +6.4%MoM / won −4.6%20d [Wait · 09.02]4 quadrants: co-movement (strength/weakness) fits the assessment → wait; the 2 divergence cases → watch; assessment falsification condition 1 ('continued strength despite falling unit prices') → trigger. Mixed frequency: monthly unit prices × daily exchange rates. Outside a unit-price update month, only the exchange rate has moved.
⑥Real−BEI divergenceReal 30y +6bp / BEI +3bp (5 days) [Wait · 09.01]BEI 5-day change |10bp| or more → trigger (intervention reaches expectations); divergence |5bp| or more → watch. While only real yields move, this is the fingerprint of supply-and-demand intervention.
⑦ERP + cracks−1.39pp · B200/H100 2.24 · Chinese providers 54.7% · cracks 08/31 [Watch · 09.02]21-day change ≤−30bp → trigger; negative ERP → watch (speed becomes valid after enough observations). ERP is daily; the crack signal is weekly. The chip date refers to ERP; the crack date appears in the value. Do not read them as same-date values. While 13-week/4-week changes are None, accumulation is insufficient: do not infer a direction.
⑧Yen switchUS–Japan gap 180bp · L2 −$443bn · condition unmet [Wait · 09.02]L2 (corporate/institutional direct and other investment, 12-month net outflows) turning positive → trigger. This is the switch, not the interest-rate gap. A US–Japan gap ≤170bp means watch only: carry-unwind pressure, not the main flow. Cyclical-to-structural = 1:89. The components differ (stock vs 12-month flow); do not interpret them as 'a multiple of relative importance'. Read only the difference in scale. Clear values if the source is more than 21 days old.
Removed for this edition, with possible return: cumulative foreign flows (absorbed into ①) and the bill share. No composite mania score.
07

The Value of Savings

#14 The Value of Money · #15 The Value of Compute · #16 The Value of a Company · #17 —

Savings have long been the market's last safety net, a place to turn when markets collapse. In Korea now, the reverse is happening. Savings have stepped forward as the market's The Last Buyer. Retail investors entered directly (KRW 102.0 trillion net buying), companies bought their own shares (KRW 25.0 trillion), and professionals sold. Pension funds stood on the other side under a formula's instructions.

The buyer's identity redraws the map of vulnerabilities. Mania is the weakness of a retail-supported market. This edition's gauge needles therefore measure vulnerabilities with its needles rather than predict. In cases such as the pension overhang, the management formula itself becomes an automatic selling mechanism. In an era of managed prices, savings have become the value supporting prices. The value of savings is the value of a country's stock market.

Stories remain untold: the financial vulnerability of the buybacks supporting Japan's rally; the decomposition of "excess yen supply" (carry was not the main component); and what savings buy when they cross borders. Next time, we will cross borders. Meanwhile, dates to watch: 9/16~17 (FOMC: as of 9/1, markets priced a rate increase at roughly 2/3 probability) →9/21 (Vietnam upgrade; SK D&D rights certificates list) →10/6~15 (SK D&D final issue price, subscription and payment) →end-October (Samsung's board). Autumn's calendar will write the next chapter.

★9/2 Close — Chance on Top of Mania
On the night the US struck Iran again: Brent $95; US 10-year yield 4.79% (highest since January 2025), 30-year 5.27%; Japan 10-year 3% (first since 1996). KOSPI 6,562.72(−3.99%) · KOSDAQ −2.10% · Nikkei −2.85%. In KOSPI, retail net buying of KRW 2.3028 trillion and other corporations' KRW 1.6505 trillion absorbed foreign net selling of KRW 1.9095 trillion and institutions' KRW 2.0438 trillion. Samsung Electronics −4.02%, SK hynix −4.73%, KRW/USD 1,368.7. An unpredictable event (layer 2) was amplified in a market resting on mania (layer 3), pulling the first rung of the rate shock (layer 1). Savings were the buying hands that day too.
Boboo from Sky
This report is for information only and does not recommend buying or selling any security or product. Individual companies and institutions are cases illustrating rules and flows. Statements about their intentions go no further than assessing whether public configurations and formulas fit. Pension descriptions cover observed net buying and public formulas (target allocations and permitted ranges); they are not policy judgments. Figures are snapshots as of their stated dates. ★ marks an original source awaiting recheck. Investment decisions and responsibility rest with the investor.

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