Korea's 5.5% stock drop and bitcoin's wide range

What happened

According to CoinDesk, the selling started in Asian equities. The Korean benchmark ended the day about 38% below the record it set in June. Samsung Electronics lost 7% and SK Hynix lost 10%, leading the Korean declines.

CoinDesk linked the move to growing doubt about AI-related stocks. The Broadcom chief executive described AI investing as casino-like, and reports of memory-chip progress at China's CXMT raised the prospect of tougher competition for established chipmakers.

Crypto moved with the risk mood. Bitcoin fell below $81,000, rebounded past $84,000 and settled a little above $83,000. CoinDesk listed bitcoin at $83,243.49 and ether at $2,504.17 at the time of its report.

The numbers in context

Tradevo's data uses daily closes from Bybit, as of 2026-10-14. A daily close smooths out moves like Tuesday's, so the intraday range is wider than any single close suggests.

• Bitcoin last close: $83,407. Change over 7 days: up 0.1%. Over 30 days: up 6.7%. Over 90 days: up 30.5%.
• Bitcoin sits 3.7% below its 90-day high close of $86,616 and 32.8% above its 90-day low close of $62,823, or 87% of the way up that range.
• Bitcoin is 2.7% above its 50-day average of $81,227. The intraday low under $81,000 briefly dipped beneath that average.
• Ether last close: $2,508. Down 2.6% over 7 days, down 0.3% over 30 days, up 36.2% over 90 days.
• Ether is 9.6% below its 90-day high close of $2,776 and 1.9% below its 50-day average of $2,558. Its intraday low was $2,400.

The contrast matters. Bitcoin's 7-day change is almost flat, yet a single session carried it from under $81,000 to over $84,000. Weekly change figures hide that kind of path.

What the range means for risk per trade

Risk per trade is the amount you accept losing if your stop is hit, usually set as a fixed share of the account. Position size is the output, not the input: you divide that fixed risk by the distance from entry to stop. When the stop must sit further away, the position gets smaller. Conviction does not change the arithmetic.

A day like Tuesday tests that rule. A stop placed just under an obvious level, such as the 50-day average near $81,227, would have been touched when bitcoin traded below $81,000, even though the close ended back above $83,000. The trader is stopped out of a move that recovered within the session.

There are two honest responses. One is to widen the stop so it sits beyond the noise a day like this produces, and cut size so the cash at risk stays the same. The other is to keep the tight stop and accept that it will be hit more often. Both are valid. Keeping a tight-stop size with a wide stop is not.

Ether's position is different

Ether sits below its 50-day average and further from its 90-day high than bitcoin does. Its intraday drop to $2,400 came from a level already under that average. For anyone sizing positions in both, the same account risk will usually buy different notional amounts, because the stop distances differ.

The next numbers to watch

CoinDesk flagged Wednesday's U.S. CPI report as another possible source of volatility. Forecasts put headline inflation at 3.6% year over year and core at 2.5%. If the headline lands on forecast, it would run faster than the 3.4% recorded one month earlier.

Third-quarter results from JPMorgan Chase, Goldman Sachs and Citigroup were also due the same day, offering a read on consumer demand and credit conditions. Scheduled releases like these are known in advance, so size can be set before the number lands rather than after.