Bitcoin (BTC) began the third week of October defending support at $82,500, with the release of key United States inflation data looming as the week's primary volatility catalyst for risk assets. Attention centers on Wednesday's Consumer Price Index (CPI) print and Thursday's Producer Price Index (PPI) report, with markets currently expecting September CPI to come in at 3.7% year-on-year. Elsewhere, oil prices digested a United States plan to purchase Russian diesel, while Bitcoin sealed a weekly close above the $82,500 level, steering clear of a drop back into its previous 2026 macro range between $60,000 and $80,000.

Markets see September inflation creeping higher

US inflation data is in traders' crosshairs this week ahead of the Federal Open Market Committee's Oct. 28 meeting on interest-rate policy. The September CPI figures will be released on Wednesday, with the PPI data following on Thursday.

August CPI broadly conformed to expectations at 3.4% year-on-year, and consensus now points to an uptick to 3.7% for September on the back of ongoing military action in the Middle East and the associated surge in fuel prices. PPI is expected at 0.3% month-on-month, compared with 0.2% in August.

US CPI 12-month percentage change by category. Source: Bureau of Labor Statistics

Crypto, stocks and gold traditionally benefit from lower-than-expected inflation readings, as these reduce the odds of the Fed tightening policy and allow capital inflows to strengthen. Speaking to Reuters about current gold prices and US bond yields, Tim Waterer, chief market analyst at KCM Trade, drew attention to the impact of a surprise move to the downside in the CPI and PPI readings in particular.

"In the short term, a cooler-than-expected US inflation reading would be the clearest near-term catalyst, as it would reduce the odds of further Fed tightening and ease pressure on real yield," he said.

CME FedWatch data show that markets see just an 18.8% chance of a rate hike on Oct. 28 from the current 3.75%-4.00% target range. The following meeting, in December, is attracting 70.6% odds of the Fed hiking by 25 basis points, to 4.00%-4.25%.

Fed target-rate probabilities. Source: CME Group

Fed chair Kevin Warsh is due to hold a discussion with Kristalina Georgieva, managing director of the International Monetary Fund (IMF), at an event in Bangkok, Thailand, on Friday.

Oil briefly cools on US-Russia diesel announcement

US bond yields have come off the 24-year highs seen last week, with the 10-year and 30-year yields at 5.24% and 5.60%, respectively, on Monday.

US 10-year bond yield, one-hour chart. Source: Cointelegraph/TradingView

Stock futures were green to start the week, with the S&P 500 index up 0.25% and sitting around 30 points short of new all-time highs.

S&P 500 futures, one-hour chart. Source: Cointelegraph/TradingView

An announcement by United States President Donald Trump of a deal to buy 300,000 tons of diesel from Russia appeared to have only a modest knock-on effect on oil prices, with the plan facing growing bipartisan backlash. Trump also announced an "energy ceasefire" between Russia and Ukraine.

"Effective immediately, there is an ENERGY CEASEFIRE in the War between Russia and Ukraine. Both parties have agreed," he wrote on Sunday in a post on Truth Social. Ukraine's President Volodymyr Zelenskyy said he was unaware of the energy ceasefire.

WTI crude traded around $91.50 per barrel on Monday, up 2% from the day's low of $89.60 after briefly dropping below the $90 mark. Data from motorist group AAA put the average price of diesel at $6.26 per gallon, versus all-time highs of $6.52 seen on Sept. 22. Fuel prices are a direct component of consumer inflation readings, adding an extra layer of sensitivity to this week's CPI and PPI prints.

CFDs on WTI crude oil, one-hour chart. Source: Cointelegraph/TradingView

PVM analyst Tamas Varga told Reuters that Russia's reduced output capacity made the impact of the deal "questionable."

"However, Moscow has partially lifted its ban on diesel exports, allowing 500,000 tonnes (around 3.7 million barrels) to be released onto the international market, equivalent to roughly one day of US consumption and around 13% of global demand," he noted.

Bitcoin avoids support breakdown at weekly close

At around $83,700 on Bitstamp, Sunday's weekly candle close cemented a 32% weekly decline for BTC/USD.

At the same time, the pair preserved a key support level at $82,500 on weekly time frames, thereby avoiding a return to its previous long-term range between $60,000 and $80,000. As Cointelegraph previously reported, $82,500 remains on traders' radar as a crucial line in the sand for Bitcoin bulls.

BTC/USD, one-week chart. Source: Cointelegraph/TradingView

Last week, trader and analyst Rekt Capital wrote that a weekly close above $82,500 would mark a "successful" support retest. This, in turn, could see investors continue to reaccumulate BTC at current levels, opening up the path higher in a manner similar to Bitcoin's recovery from its 2022 bear market.

In light of Bitcoin's multiple support retests following its initial breakout in July, trader and analyst Aksel Kibar drew comparisons between crypto and stock markets. Since May, the S&P 500 has seen multiple retests at key levels, initially at 7,300 points and then at 7,600 points.

S&P 500, one-day chart. Source: Cointelegraph/TradingView

Bitcoin could be experiencing a "hard retest" of support in a similar manner, with the implication that BTC/USD should shift higher if those retests continued to succeed, Kibar wrote in an X post on Sunday. With the CPI and PPI releases due on Wednesday and Thursday, the near-term focus is whether BTC/USD can preserve its freshly defended $82,500 support through the week's macro data.