Pump.fun sees $40M inflow as whales drive rally
Pump.fun (PUMP)
Editor:
Eugene Serbin
ambcrypto.com reports that Pump.fun [PUMP] posted a double-digit percentage gain over the past day, driven primarily by capital flowing into the perpetual market. Traders pushed Open Interest up by roughly $40.83 million in fresh capital, bringing the total to $355.08 million. This condition leans heavily toward long positions, with the Funding Rate rising from roughly 0.0007% to around 0.0072%, indicating strong short-term bullish expectations.
Whale involvement, tracked through the Whale Retail Delta, reached a high positive level of 0.274, suggesting these large investors are key drivers of the rally through decisive buying. Market sentiment also surged, with CoinMarketCap data placing the reading at 3.53 on a -10 to 10 scale, while the metric tilts upward to show growing confidence. Spot investors have joined this bullish outlook, with cumulative net buying exceeding selling over the past 12 hours.
Data from CoinGlass shows Netflow reached -$1.13 million, indicating capital outflows as more PUMP moved into private wallets. This movement suggests investors expect a bullish outcome, which could add to the asset's current price momentum. The combination of whale buying and negative Spot Netflow points to growing momentum supporting PUMP’s near-term outlook.
How the market reacted
Whalio's own Binance spot order flow for PUMP, measured when this story was written up on 13 September 2026. Not the outlet's figures.
PUMP is currently trading at $0.003778 on Binance spot markets. The 1-hour buy ratio stands at 44.0%, while the 4-hour ratio is slightly lower at 43.9%, both sitting below the 24-hour buy ratio of 50.6%. This indicates that buying pressure is fading in the short term compared to the daily average. Volume Delta reflects this shift, showing negative values of -$49,535 for the hour and -$250,295 for the four-hour window. However, the 24-hour Volume Delta remains positive at +$271,080. The Cumulative Volume Delta (CVD) at the 24-hour close is -$909,598, showing that net selling pressure has outweighed buying over the full day. Only 8 of the last 24 hours saw net buying, with total Spot Volume reaching $22,230,031 across 181,666 trades.
The latest daily buy ratio of 50.6% sits at the 63rd percentile of the last 322 days, against a median of 49.3% - ordinary for this coin.
Was that an ordinary day?
The same Binance spot measurements for PUMP, averaged over the days leading up to the story.
Over the preceding week, PUMP experienced a mixed trading environment with 5 days of net buying out of 7. The 7-day average buy ratio was 51.3%, which is 0.7 percentage points higher than the latest day's reading. Volume during this period was 0.51 times the average, indicating significantly lower activity than usual. The price change over the 8-day period was -1.6%, despite a total Volume Delta of +$9,903,948 for the timeframe. This suggests that while net buying occurred, the reduced volume and price decline characterize the recent week as an unusually quiet period for the coin.