The Week

iShares Core S&P 500 (IVV) fell 0.78% over four trading days, closing at $767.92, down from $773.92 the previous Friday. The S&P 500 lost 0.8%, so IVV outperformed by roughly 0.02 percentage points, a near-zero gap. The week was not a straight slide: Tuesday opened at $772.76 and drifted to $769.20; Wednesday and Thursday kept pressing lower, with Thursday touching $760.30, the week’s low; Friday rebounded after CPI data, finishing at $767.92. The close sits just under the 20-day moving average but still above the 60-day line.

S&P 500 This Week

The underlying index dropped 0.8% for the week, ending at 7,656.98 versus 7,718.60 the prior Friday. The weekly range was 1.78%, with average daily volume of 2.80 billion shares, marginally below the 60-session median. The pattern tracked IVV closely: Tuesday and Wednesday closed lower, Thursday hit a low of 7,580.06, and Friday rebounded to 7,656.98 as oil eased and CPI landed. The index closed below its 20-day moving average of 7,685.19 but above the 60-day average of 7,576.98.

Leverage & Decay

IVV provides 1x daily exposure to the S&P 500, so the theoretical weekly move matched the index at -0.8%. The actual return was -0.78%, leaving a gap of +0.02 percentage points. This gap comes from daily rebalancing: the product replicates the fixed multiple of each day’s move, not the week’s cumulative move. In trending markets the decay is limited, but choppy two-way action can make the compounding path diverge from a simple multiple, meaning long-term returns do not equal a straight multiple of the index. This week’s path was down-then-up with amplitude of 1.68%, and the small positive gap suggests rebalancing costs were negligible.

S&P 500 News

The week’s narrative centred on inflation and oil. Mid-week, WTI crude crossed $100 and Treasury yields climbed, pushing US stocks to four consecutive losing days, with AI worries hitting software makers. August PPI came in above expectations, and the following CPI print showed firmer inflation, briefly lifting odds of a September Fed rate hike to nearly 90%. On Friday oil pulled back and yields fell, driving a sharp rally that closed a red week on an upswing. Separately, HSBC raised its 2026 S&P 500 year-end target to 8,100, while Barclays lifted it to 7,950.

The Week Ahead

The Fed’s 16 September FOMC meeting is the main event, with market pricing implying close to a 90% probability of a hike. On 15 September, the New York Fed manufacturing index arrives, with a prior reading of 20.6. On 16 September, the calendar is heavy: retail sales, retail sales ex-autos, import prices, the NAHB housing market index and weekly EIA crude inventories. For IVV, the question is whether the S&P 500 can hold its rebound against renewed rate expectations and oil moves.

In Short

IVV finished the week slightly lower but essentially matched the S&P 500, with no extra erosion on the leveraged path. Price-wise, the close remains above the 60-day moving average and below the 20-day line, consistent with a short-term pullback inside an intact medium-term trend. Valuation shows a latest-snapshot P/E near 10.73 and P/B near 1.79; the most recent session’s large-lot flow was net selling, but that is a single-day snapshot and cannot be read as a weekly trend. Two forces pull against each other: brokers lifting year-end targets versus firmer inflation and rising rate-hike expectations. The next step is whether the Fed meeting reprices the rate path and whether oil keeps easing.

This article is generated by LongbridgeAI from market data, for information only and not investment advice.