Daily Economics, Business and Finance Study

October 6, 2026 (KST) · Day 16
Today's topic: Identical Price Gains Can Mean Different Things — Assessing Rally Quality with Volume, Trading Value and Turnover

1. Review of yesterday's key points

Day 15 explained that prices rise when aggressive buys consume asks and execute higher, not simply because there are “more buyers.” Today we measure these executions through volume, trading value and turnover to assess how much participation and capital accompanied the move .

2. Today's core concept

Prices show direction; volume shows participation; trading value shows how much money that participation involved.

High volume alone does not establish strong buying pressure.

\[\text{Executed buy volume}=\text{Executed sell volume}=\text{Trading volume}\]

Every trade has equal quantities bought and sold.

Always interpret volume alongside these questions:

• Did the share price rise or fall?
• Did it close near the intraday high or low?
• How much did volume increase versus normal?
• Was trading value sufficiently large?
• What percentage of the float traded?
• Did earnings, disclosures or news explain the increase?
• Did the higher price hold or immediately reverse?

Today's central question is:

“Beyond the fact that prices moved, how much money and share turnover accompanied the move, and did its result persist?”

3. Concept explained

3-1. Volume: the number of shares traded

**Trading volume** is the number of shares actually executed during a period.

If one investor buys 1,000 shares and another sells 1,000, reported volume is generally 1,000, not 2,000 shares.

\[\text{Trading volume}=\text{Executed quantity}\]

Volume can be classified by period:

• Tick volume
• 1-minute, 5-minute and 60-minute volume
• Daily volume
• Weekly volume
• Monthly volume

The same volume means different things at different company sizes.

• 1 million shares traded with a 10 million-share float
  → 10% of float

• 1 million shares traded with a 1 billion-share float
  → 0.1% of float

Compare volume with float and normal trading activity, not just its absolute value.

3-2. Trading value: the amount of money exchanged

**Trading value** sums execution price multiplied by quantity across trades.

\[\text{Trading value}=\sum(\text{Execution price}\times\text{Quantity})\]

A simple approximation using average daily price and volume is:

\[\text{Trading value}\approx\text{Average share price}\times\text{Volume}\]

For example, 1 million shares traded at KRW 5,000 implies approximately KRW 50 hundred million of trading value.

\[5,000\text{ KRW}\times1,000,000\text{ shares}=50\text{ hundred million KRW}\]

100,000 shares at KRW 100,000 is lower volume but approximately KRW 100 hundred million of trading value.

\[100,000\text{ KRW}\times100,000\text{ shares}=100\text{ hundred million KRW}\]

Trading value may therefore be more useful than volume for comparing participation across differently priced shares.

3-3. How do volume and trading value differ?

A stock split can increase share count and volume without changing company value. Unadjusted pre- and post-split volume comparisons are distorted.

Trading value is relatively useful across splits because price and share-count changes partly offset. It remains imperfect because market-price changes still affect it.

3-4. Relative volume: how much more traded than usual?

Volume growth versus normal matters more than the absolute figure.

**Relative volume (RVOL)** compares current volume with its historical average.

\[RVOL=\frac{\text{Current volume}}{\text{Historical average volume}}\]

If today's volume is 6 million shares and the last 20 trading days averaged 2 million:

\[RVOL=6,000,000\div2,000,000=3.0\times\]

Today's volume is three times the recent average.

Mean versus median

A high-volume earnings day can inflate the historical average. Also consider median volume in such cases.

\[RVOL_{\text{median}}=\frac{\text{Current volume}}{\text{Median volume over the last N days}}\]

Errors in intraday comparisons

Do not compare volume at 10 a.m. with the last 20 days' full-day average.

The appropriate comparison is:

\[\text{Intraday RVOL}=\frac{\text{Today's cumulative volume through 10 a.m.}}{\text{Average cumulative volume through 10 a.m. over N days}}\]

Intraday volume usually clusters near the open and close, so compare matching times.

3-5. Volume turnover: how much of the float traded?

The **turnover ratio** expresses volume as a percentage of outstanding or floating shares.

Turnover based on shares outstanding is:

\[\text{Outstanding-share turnover}=\frac{\text{Volume}}{\text{Shares outstanding}}\times100\]

Float-based turnover is:

\[\text{Float turnover}=\frac{\text{Volume}}{\text{Tradable float}}\times100\]

Tradable float can roughly be understood as:

\[\text{Tradable float}\approx\text{Shares outstanding}-\text{Treasury shares}-\text{Long-term major-shareholder stakes}-\text{Restricted shares, including lockups}\]

Providers may define float differently. Use consistent definitions when comparing.

What high turnover means

• Active share transfers between existing holders and new investors
• Strong interest in news, earnings or themes
• Potentially high short-term investor participation
• Potentially greater supply–demand conflict and volatility
• Potentially increased speculation, depending on the stock

High turnover is not always positive. If prices fail to rise afterward, large sell orders may be persistently entering the market.

3-6. VWAP: average execution price weighted by volume

**VWAP** means volume-weighted average price.

\[VWAP=\frac{\sum(\text{Execution price}\times\text{Quantity})}{\sum\text{Quantity}}\]

A simple price average ignores volume; VWAP gives more weight to prices with more trading.

Assume the following trades.

\[VWAP=40,100,000\div4,000=10,025\text{ KRW}\]

A current price of KRW 10,100 is above today's average execution price. KRW 9,950 would be below the average buyer's execution price.

Do not treat VWAP as absolute support or resistance.

• VWAP depends on the calculation's starting point.
• Institutions may execute orders targeting VWAP itself.
• New information reduces the relevance of earlier average prices.
• Yesterday's VWAP is not necessarily relevant the next day.

VWAP is fundamentally a benchmark for comparing average execution prices and execution performance.

3-7. A basic framework for interpreting price and volume together

This table is a starting point, not a conclusion. Even “price up + volume up” means different things depending on the intraday path and closing position.

Close near the high

• A high price holds after absorbing sell orders
• Buyers accept the price through the close
• Potentially positive

Intraday spike followed by a close near the low

• Selling emerges at higher prices
• Momentum chasing fails
• Possible profit-taking or distribution

On daily charts, examine open, high, low and close relationships as well as volume.

3-8. Volume records participation rather than causing the move

Higher volume does not guarantee rising prices.

\[\text{Higher volume}\ne\text{Purely stronger buying pressure}\]

Higher volume means buyers and sellers both traded actively.

Price direction depends on:

• Which side used market and marketable limit orders more aggressively?
• Which side's quoted liquidity was exhausted first?
• Did additional buyers arrive at higher prices?
• Did buyers absorb shares at lower prices?
• At what level did the price stabilize afterward?

Volume is therefore not inherently a buy signal; it measures the scale of participation and disagreement.

3-9. One day's volume cannot establish accumulation or distribution

Accumulation

Generally, a large investor's purchases over a period.

Patterns that may help infer accumulation include:

• Repeated volume increases with limited price declines
• Dip buying despite negative news
• Repeated closes above VWAP or the intraday midpoint
• Higher trading value on up days than down days
• Evidence of improved earnings, orders or industry conditions
• Volume increases again after a correction without breaking the previous low

Distribution

A large holder's sales over a period.

Potentially relevant patterns include:

• Surging volume without a new price high
• An intraday spike followed by a close near the low
• Failure to hold gains despite good news
• Higher trading value on down days than up days
• Heavy selling on each rebound
• Rising volume while fundamental estimates fall

Daily charts cannot establish that a particular investor is accumulating or distributing. Also examine block trades, institutional flows, disclosures, ownership changes and derivatives hedges.

3-10. Net buying by investor category differs from volume

Volume is total shares executed. Net buying is a particular investor group's purchases minus its sales, by value.

\[\text{Net buying}=\text{Purchase value}-\text{Sale value}\]

For example:

• Foreign investors: +KRW 500 hundred million
• Institutions: -KRW 200 hundred million
• Individuals: -KRW 300 hundred million

Across the market, one group's net buying corresponds to others' net selling.

\[\text{Sum of net buying across investor groups}\approx0\]

Fees, aggregation methods and categories such as other corporations may cause differences. Fundamentally, someone's net purchase is another's net sale.

Do not automatically interpret foreign or institutional net buying as long-term conviction.

• ETF creation and redemption
• Index inclusion and exclusion
• Futures and options hedging
• Arbitrage
• Currency hedging
• Short covering
• Block deals
• Short-term algorithmic trading

may be included.

4. A simple numerical example

All the following figures are hypothetical educational examples.

Example 1: Volume differs from trading value

Company A's trading value is:

\[5,000\text{ KRW}\times2,000,000\text{ shares}=100\text{ hundred million KRW}\]

Company B's trading value is:

\[100,000\text{ KRW}\times200,000\text{ shares}=200\text{ hundred million KRW}\]

A's volume is ten times B's, but B's trading value is twice A's.

Volume alone makes A appear more active, but trading value shows more capital traded in B.

Example 2: Outstanding-share versus float turnover

Assume company C has:

• Shares outstanding: 100 million
• Nonfloating shares, including controlling stakes, treasury shares and lockups: 60 million
• Tradable float: 40 million shares
• Today's volume: 8 million shares

Turnover based on shares outstanding is:

\[\text{Outstanding-share turnover}=8,000,000\div100,000,000\times100=8\%\]

Float-based turnover is:

\[\text{Float turnover}=8,000,000\div40,000,000\times100=20\%\]

Volume equals 8% of outstanding shares but 20% of shares actually tradable in the market in one day.

This implies substantial turnover. However, the same shares may trade repeatedly, so it does not prove that 20% of distinct shareholders were fully replaced.

Example 3: Relative volume and matching intraday times

Company D has traded 6 million shares by 3 p.m. today.

• Last 20 days' average full-day volume: 3 million shares
• Last 20 days' average cumulative volume through 3 p.m.: 2.5 million shares

Simple relative volume versus the daily average is:

\[RVOL=6,000,000\div3,000,000=2.0\times\]

Relative volume at the matching time is:

\[\text{Intraday RVOL}=6,000,000\div2,500,000=2.4\times\]

By 3 p.m., 2.4 times normal same-time volume had traded.

During the session, matching-time averages provide a more accurate comparison than full-day averages.

Example 4: Equal gains can differ in quality

Assume hypothetical companies E and F both rise 8% in one day.

Their daily returns are equal, but the implications differ.

Company E

• Volume and trading value rise substantially
• A verifiable earnings catalyst exists
• Close near the high
• The price holds the next day

This is relatively more likely to reflect reassessment based on new information.

Company F

• Volume below normal
• Low trading value
• An intraday spike gives back gains
• Little fundamental support

Investigate whether a few orders lifted thin asks or the move was short-term speculation.

This alone does not make E a buy and F a sell. E's good news may be excessively priced in, while F's rise may be an early signal of information confirmed later.

5. Practical use in equity and company analysis

① Compare volume with historical averages

Compare today's volume with:

• Last 5 trading days' average
• Last 20 trading days' average
• Last 60 trading days' average
• Last 20 trading days' median
• Same-weekday and same-time volume
• Previous earnings-day volume
• Previous breakout or sharp-decline volume

Even apparently large volume of 5 million shares is subdued for a stock normally trading 10 million.

Conversely, 500,000 shares is five times average for a stock normally trading 100,000.

② Assess rally quality in five steps

Step 1: Catalyst

• Earnings
• Guidance
• Orders
• Product launch
• Regulatory change
• Industry conditions
• A mere theme or rumor

Step 2: Volume and trading value

• How many times normal activity?
• Is trading value large enough for institutions to participate?

Step 3: Intraday price path

• Did it close near the high?
• Did a sharp rise give back gains?
• Did it stabilize above VWAP?

Step 4: Persistence after the rise

• Does the gap hold the next day?
• Does volume decline during corrections?
• Does it slip below the breakout level again?

Step 5: Fundamental connection

• Are EPS and FCF estimates actually being raised?
• Can the company meet demanding reverse-DCF expectations?
• Is valuation still justified?

③ Assess breakout reliability

A resistance breakout may be more reliable when accompanied by:

• Volume meaningfully above recent averages
• Higher trading value too
• A close above resistance
• Lower volume on the subsequent pullback
• Renewed buying near former resistance
• Verifiable catalysts such as earnings or orders
• Confirmation from peers and the industry index

Conversely, warning signs include:

• An intraday breakout but a close below resistance
• A rise on small executions without volume
• A sharp fall with rising volume immediately afterward
• A theme unrelated to company fundamentals
• Upcoming large offerings, conversions or lockup expirations
• Surging trading value at the high without further gains

④ Heavy volume at highs is not automatically a sell signal

People often describe heavy volume at highs as “large players unloading,” but volume alone cannot verify this.

Heavy volume at highs may reflect any of:

• Existing shareholders taking profits
• New institutional buying
• Passive buying following index inclusion
• Simultaneously higher short selling and covering
• Price discovery after upward earnings revisions
• Transfers from short-term to long-term investors
• Risky transfers from long-term holders to momentum chasers

Subsequent price action matters.

⑤ Use trading value to assess practical tradability

Even a good investment idea faces these problems when trading value is too low:

• Difficulty buying at the desired price
• Your purchase itself may raise the price
• Substantial slippage on selling
• An exit may disappear after bad news
• A few orders may distort the chart

Compare your order value with average trading value.

\[\text{Expected participation}=\frac{\text{Your order value}}{\text{Expected trading value}}\times100\]

A KRW 2 hundred million purchase in a stock averaging KRW 20 hundred million daily implies simple participation of 10%.

\[2\text{ hundred million}\div20\text{ hundred million}=10\%\]

Completing the purchase in one day or selling urgently may increase impact. If the order is substantial relative to normal trading value, prioritize considering split and limit orders.

⑥ Examine duration and causes of foreign and institutional net buying

Do not base a long-term investment decision on one day's foreign buying.

Separate these periods:

• Today
• Last 5 trading days
• Last 20 trading days
• Since the earnings release
• Since the industry turning point
• Around index inclusion or rebalancing

Then distinguish the reasons for net buying.

• Long-term fundamental buying
• ETF or index tracking
• Futures–cash arbitrage
• Currency movements
• Short covering
• Block deals
• Short-term trading

More important than foreign buying itself is under what conditions and how persistently it occurred, and how prices and earnings responded.

⑦ Connect volume spikes with disclosures

When volume multiplies, investigate causes in this order:

1. Same-day DART, KIND and SEC filings
2. Official IR and company releases
3. Earnings or guidance changes
4. Major contracts, orders or permits
5. Equity offerings, CBs, BWs and block deals
6. Controlling-shareholder or executive ownership changes
7. Lockup releases and expirations
8. Index inclusion and exclusion
9. Industry and competitor news
10. Themes and unverified rumors

If volume surges without a disclosed explanation, do not treat unverified information as fact. It is safer to label it cause unconfirmed.

⑧ Separate the roles of charts and financial analysis

Volume and charts can indicate:

• Increased market attention
• Timing of repricing
• The scale of conflict between buying and selling
• Liquidity and execution risk
• Market reactions to good and bad news
• How much expectation is already priced in

But they cannot independently prove:

• Fair company value
• Long-term growth
• Normalized FCF
• ROIC
• Competitive advantage
• Debt-servicing ability
• Earnings sustainability

A useful analytical sequence is:

\[\text{Filings and financial analysis}\rightarrow\text{Assess value and expectations}\rightarrow\text{Check market reaction through price and volume}\]

6. What to look for in filings

Volume, trading value, turnover and investor-category flows come from exchange and broker data, not financial statements. Use filings to find causes of volume spikes and changes in future share supply.

Korean companies: DART and KIND

Financial Supervisory Service DART and Korea Exchange KIND for the following items.

Cautions when calculating turnover

Reported shares outstanding may require adjustments for:

• Treasury shares
• Long-term controlling-shareholder and related-party holdings
• Locked-up shares
• Employee ownership shares under mandatory holding periods
• Long-term government and strategic-investor holdings

Definitions of tradable float vary by provider, so state the definition used in your analysis.

U.S. companies: SEC EDGAR

SEC EDGAR for the following.

Market data to check outside filings

Check aggregation methods and reporting lags for foreign, institutional and short-selling data. Preliminary daily figures may differ from final figures, and net buying alone does not reveal trading motives.

7. Key takeaways

• Volume counts shares executed during a period once; it does not add bought and sold quantities together.
• Trading value sums execution price times quantity and helps compare capital traded across stocks.
• Assess volume relative to recent means, medians and matching times rather than only absolute volume.
• Turnover divides volume by outstanding or tradable shares; specify the denominator.
• Shares may trade repeatedly in a day, so 20% turnover does not necessarily mean complete replacement of 20% of distinct shareholders.
• VWAP is the volume-weighted average execution price: an execution benchmark, not absolute support.
• Higher volume indicates greater interaction between buyers and sellers, not purely stronger buying.
• Even when price and volume rise together, check the closing position, catalyst and next-day persistence.
• Heavy volume at highs cannot independently prove accumulation or distribution; subsequent prices matter.
• Low-trading-value stocks may move sharply on a few orders and experience substantial selling slippage.
• Foreign and institutional net buying may involve indices, ETFs, hedging, arbitrage or short covering rather than long-term conviction.
• Use filings to investigate business reasons for volume spikes and future supply changes from offerings, convertibles, treasury shares and lockups.

8. Three review questions

Question 1

Hypothetical company G's average execution price is KRW 25,000, and today's volume is 1.2 million shares.

1. What is today's trading value?
2. If average volume over the last 20 trading days is 400,000 shares, what is RVOL?

Question 2

Company H has 80 million shares outstanding, including 50 million nonfloating shares such as controlling stakes, treasury shares and lockups. Today's volume is 6 million shares.

1. What is outstanding-share turnover?
2. What is float turnover?
3. Which better reflects turnover of shares actually available in the market?

Question 3

Two stocks both rose 10% in one day.

• J: volume 4 times its recent average, trading value KRW 2,000 hundred million, raised earnings guidance, close near the intraday high
• K: volume 0.6 times its recent average, trading value KRW 15 hundred million, no confirmed disclosure, an 18% intraday rise reduced to 10% at the close

Which rise appears to reflect stronger repricing, and what else should you check?

Answers and explanations

Answer 1

Trading value is:

\[\text{Trading value}=25,000\text{ KRW}\times1,200,000\text{ shares}\]

\[\text{Trading value}=300\text{ hundred million KRW}\]

Relative volume is:

\[RVOL=1,200,000\div400,000=3.0\times\]

Today's volume is three times the last 20 trading days' average.

Answer 2

Turnover based on shares outstanding is:

\[\text{Outstanding-share turnover}=6,000,000\div80,000,000\times100=7.5\%\]

Tradable float is:

\[80,000,000-50,000,000=30,000,000\text{ shares}\]

Float-based turnover is:

\[\text{Float turnover}=6,000,000\div30,000,000\times100=20\%\]

Float turnover of 20% is more useful for assessing turnover of actually tradable shares.

Repeated intraday trading means this does not prove complete replacement of 20% of distinct shareholders. Also verify the definition of nonfloating shares.

Answer 3

Initially, J's rise appears to be stronger information-driven repricing.

• Volume is 4 times the recent average
• Trading value is sufficiently large
• Raised earnings guidance provides a verifiable catalyst
• The close is near the high

K has low volume and trading value, gave back much of its intraday gain and has no confirmed disclosure. Investigate whether thin asks or short-term thematic orders caused the large move.

J is not automatically a buy either. Also check:

• Does the raised guidance actually exceed consensus?
• How much are EPS and FCF estimates increasing?
• How far had shares already risen before release?
• Are current P/E, EV/EBITDA and FCF yield demanding?
• Does the higher price hold the next day and week?
• Does volume decline during the subsequent correction?
• Are there supply issues involving treasury shares, convertibles or lockup expirations?

Next lesson — Day 17 · Chart basics:
“Candles Are Results, Not Causes — Reading OHLC, Trends, Support and Resistance”